149,597,870,700
149,597,870,700 metres is the astronomical unit, fixed by definition in 2012.
- Even
- Composite
Where 149,597,870,700 fits
Why 149,597,870,700 is special
It began as the Earth–Sun distance, which is not a constant: the orbit is elliptical and the Sun loses mass. In 2012 the IAU cut the link and made it a fixed number of metres, so it is now a unit of length that happens to be about the size of the orbit rather than a measurement of it.
149,597,870,700 is part of
Factors & digit properties
- Divisors (144)
- 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 25, 30, 50, 60, 73, 75, 100, 146, 150, 219, 292, 300, 365, 438, 730, 876, 877, 1095, 1460, 1754, 1825, 2190, 2631, 3508, 3650, 4380, 4385, 5262, 5475, 7300, 7789, 8770, 10524, 10950, 13155, 15578, 17540, 21900, 21925, 23367, 26310, 31156, 38945, 43850, 46734, 52620, 64021, 65775, 77890, 87700, 93468, 116835, 128042, 131550, 155780, 192063, 194725, 233670, 256084, 263100, 320105, 384126, 389450, 467340, 568597, 584175, 640210, 768252, 778900, 960315, 1137194, 1168350, 1280420, 1600525, 1705791, 1920630, 2274388, 2336700, 2842985, 3201050, 3411582, 3841260, 4801575, 5685970, 6402100, 6823164, 6830953, 8528955, 9603150, 11371940, 13661906, 14214925, 17057910, 19206300, 20492859, 27323812, 28429850, 34115820, 34154765, 40985718, 42644775, 56859700, 68309530, 81971436, 85289550, 102464295, 136619060, 170579100, 170773825, 204928590, 341547650, 409857180, 498659569, 512321475, 683095300, 997319138, 1024642950, 1495978707, 1994638276, 2049285900, 2493297845, 2991957414, 4986595690, 5983914828, 7479893535, 9973191380, 12466489225, 14959787070, 24932978450, 29919574140, 37399467675, 49865956900, 74798935350, 149597870700
- Prime factorisation
- 2^2 × 3 × 5^2 × 73 × 877 × 7789
- Digit sum
- 57
- Digital root
- 3
Representations
- Decimal
- 149597870700
- Scientific notation
- 1.496 × 10^11
Roman numerals
Roman numerals as modelled here goes up to 3,999.
Binary
Binary (base 2) as modelled here goes up to 1,000,000,000.
Octal
Octal (base 8) as modelled here goes up to 1,000,000,000.
Hexadecimal
Hexadecimal (base 16) as modelled here goes up to 1,000,000,000.
Other mathematical patterns
- Abundant number
Related numbers & connections
149597870700 appears in Numbers in space, the topic covering numbers that carry a documented astronomy fact.
Numbers Around Us
- appears inSpace and astronomy
why?
Strength 0.50, confidence "high".
Science
The astronomical unit is 149,597,870,700 metres (worldwide, IAU since 2012). Light crosses it in about 499 seconds, which is where the familiar 'eight minutes and twenty seconds' from the Sun comes from. Fixing it in metres also removed a dependency on the Sun's mass, which decreases as it radiates.
DocumentedScienceGeography: worldwide, IAU since 2012
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 15 July 2026