1,000,000,000
1,000,000,000 is the natural number following 999,999,999 and preceding 1,000,000,001. One billion can also be written as b or bn.
In scientific notation, it is written as 1 × 109. The metric prefix giga indicates 1,000,000,000 times the base unit. Its symbol is G.
One billion years may be called an eon in astronomy or geology.
Previously in British English, the word "billion" referred exclusively to a million millions. However, this is no longer common, and the word has been used to mean one thousand million for several decades.
The term milliard can also be used to refer to 1,000,000,000; whereas "milliard" is rarely used in English, variations on this name often appear in :wikt:milliard#Translations|other languages.
In the South Asian numbering system, it is known as 100 crore or 1 arab.
Sense of scale
The facts below give a sense of how large 1,000,000,000 is in the context of time according to current scientific evidence:Time
- 109 seconds equal 11,574 days, 1 hour, 46 minutes and 40 seconds.
- About 109 minutes ago, the Roman Empire was flourishing and Christianity was emerging.
- About 109 hours ago, modern human beings and their ancestors were living in the Stone Age.
- About 109 days ago, Australopithecus, an ape-like creature related to an ancestor of modern humans, roamed the African savannas.
- About 109 months ago, dinosaurs walked the Earth during the late Cretaceous.
- About 109 years—a gigaannus—ago, the first multicellular eukaryotes appeared on Earth.
- About 109 decades ago, galaxies began to appear in the early Universe which was then 3.799 billion years old.
- The universe is thought to be about 13.8 × 109 years old.
Distance
- 109 inches is, more than halfway around the world and thus sufficient to reach any point on the globe from any other point.
- 109 metres is almost three times the distance from the Earth to the Moon.
- 109 kilometres is over six times the distance from the Earth to the Sun.
Area
- A billion square inches would be a square about one half mile on a side.
- A bolt of finely woven 1000-TC bed sheet linen with a billion thread crossings would have an area of, comparable to the floor area of a motel unit.
Volume
- There are a billion cubic millimetres in a cubic metre, and a billion cubic metres in a cubic kilometre.
- A billion grains of table salt or granulated sugar would occupy a volume of about.
- A billion cubic inches would be a volume comparable to a large commercial building slightly larger than a typical supermarket.
Weight
- Any object that weighs would weigh about as much as 5,525 empty Boeing 747-400s.
- A cube of iron that weighs would be on each side.
Products
- As of July 2016, Apple has sold one billion iPhones. This makes the iPhone one of the most successful product lines in history, surpassing the PlayStation and the Rubik's Cube.
- As of July 2016, Facebook has 1.71 billion users.
Nature
- A small mountain, slightly larger than Stone Mountain in Georgia, United States, would weigh a billion tons.
- There are billions of worker ants in the largest ant colony in the world, which covers almost of the Mediterranean coast.
- In 1804, the world population was one billion.
Count
Selected 10-digit numbers (1,000,000,001–9,999,999,999)
1,000,000,001 to 1,999,999,999
- 1,000,000,007 – smallest prime number with 10 digits.
- 1,000,006,281 – smallest triangular number with 10 digits and the 44,721st triangular number.
- 1,000,014,129 – smallest ten-digit square.
- 1,023,456,789 – smallest pandigital number in base 10.
- 1,026,753,849 – smallest pandigital square that includes 0.
- 1,073,676,287 – 15th Carol number.
- 1,073,741,824 – 230
- 1,073,807,359 – 14th Kynea number.
- 1,111,111,111 – repunit, also a special number relating to the passing of Unix time.
- 1,129,760,415 – 23rd Motzkin number.
- 1,134,903,170 – 45th Fibonacci number.
- 1,162,261,467 – 319
- 1,220,703,125 – 513
- 1,232,922,769 – Centered hexagonal number.
- 1,280,000,000 – 207
- 1,234,567,890 – pandigital number with the digits in order.
- 1,311,738,121 – 25th Pell number.
- 1,382,958,545 – 15th Bell number.
- 1,406,818,759 – 30th Wedderburn–Etherington number.
- – Population of the People's Republic of China in 2018.
- 1,475,789,056 – 148
- 1,631,432,881 – Triangular square number.
- 1,673,196,525 – Lowest common multiple of the odd integers from 1 to 25
- 1,787,109,376 – 1-automorphic number
- 1,836,311,903 – 46th Fibonacci number.
- 1,882,341,361 – The smallest prime whose reversal is both square and triangular.
- 1,977,326,743 – 711
2,000,000,000 to 2,999,999,999
- 2,038,074,743 – 100,000,000th prime number
- 2,147,483,647 – 8th Mersenne prime and the largest signed 32-bit integer.
- 2,147,483,648 – 231
- 2,176,782,336 – 612
- 2,214,502,422 – 6th primary pseudoperfect number.
- 2,357,947,691 – 119
- 2,562,890,625 – 158
- 2,971,215,073 – 11th Fibonacci prime.
3,000,000,000 to 3,999,999,999
- 3,166,815,962 – 26th Pell number.
- 3,192,727,797 – 24th Motzkin number.
- 3,323,236,238 – 31st Wedderburn–Etherington number.
- 3,405,691,582 – hexadecimal CAFEBABE; used as a placeholder in programming.
- 3,405,697,037 – hexadecimal CAFED00D; used as a placeholder in programming.
- 3,486,784,401 – 320
- 3,735,928,559 – hexadecimal DEADBEEF; used as a placeholder in programming.
- 3,735,929,054 – hexadecimal DEADC0DE; used as a placeholder in programming.
4,000,000,000 to 4,999,999,999
- 4,294,836,223 – 16th Carol number.
- 4,294,967,291 – Largest prime 32-bit unsigned integer.
- 4,294,967,295 – Maximum 32-bit unsigned integer, perfect totient number, product of the five prime Fermat numbers through.
- 4,294,967,296 – 232
- 4,294,967,297 –, the first composite Fermat number.
- 4,295,098,367 – 15th Kynea number.
- 4,807,526,976 – 48th Fibonacci number.
5,000,000,000 to 5,999,999,999
- 5,159,780,352 – 129
- 5,354,228,880 – superior highly composite number, smallest number divisible by all the numbers 1 through 24
- 5,784,634,181 – 13th alternating factorial.
6,000,000,000 to 6,999,999,999
- 6,103,515,625 – 514
- 6,210,001,000 – only self-descriptive number in base 10.
- 6,227,020,800 – 13!
- 6,975,757,441 – 178
- 6,983,776,800 – 15th colossally abundant number, 15th superior highly composite number
7,000,000,000 to 7,999,999,999
- 7,645,370,045 – 27th Pell number.
- 7,778,742,049 – 49th Fibonacci number.
- 7,862,958,391 – 32nd Wedderburn–Etherington number.
8,000,000,000 to 8,999,999,999
- 8,212,890,625 – 1-automorphic number
- 8,589,869,056 – 6th perfect number.
- 8,589,934,592 – 233
9,000,000,000 to 9,999,999,999
- 9,043,402,501 – 25th Motzkin number.
- 9,814,072,356 – largest square pandigital number, largest pandigital pure power.
- 9,876,543,210 – largest number without redundant digits.
- 9,999,999,967 – greatest prime number with ten digits.