81071990272

Names of 81071990272

• Cardinal: 81071990272 can be written as Eighty-one billion, seventy-one million, nine hundred ninety thousand, two hundred seventy-two.

Scientific notation

• Scientific notation: 8.1071990272 × 10¹⁰

Factors of 81071990272

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 1740063

Divisors of 81071990272

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 4 7 8 13 14 16 26 28 32 52 56 64 91 104 112 128 182 208 224 256 364 416 448 512 728 832 896 1456 1664 1792 2912 3328 3584 5824 6656 11648 23296 46592 1740041 3480082 6960164 12180287 13920328 22620533 24360574 27840656 45241066 48721148 55681312 90482132 97442296 111362624 158343731 180964264 194884592 222725248 316687462 361928528 389769184 445450496 633374924 723857056 779538368 890900992 1266749848 1447714112 1559076736 2533499696 2895428224 3118153472 5066999392 5790856448 6236306944 10133998784 11581712896 20267997568 40535995136 81071990272
• Sum of all divisors σ(n): 199367052192
• Sum of proper divisors (its aliquot sum) s(n): 118295061920
• 81071990272 is an abundant number, because the sum of its proper divisors (118295061920) is greater than itself. Its abundance is 37223071648

Bases of 81071990272

• Binary: 1001011100000010001000110011000000000₂
• Hexadecimal: 0x12E0446600
• Base-36: 118S641S

Squares and roots of 81071990272

• 81071990272 squared (81071990272²) is 6572667606663262633984
• 81071990272 cubed (81071990272³) is 532859244268493550642131944603648
• The square root of 81071990272 is 284731.4353421483
• The cube root of 81071990272 is 4328.0301577661

Scales and comparisons

• 81,071,990,272 seconds is equal to 2,577 years, 43 weeks, 4 days, 5 hours, 17 minutes, 52 seconds.
• To count from 1 to 81,071,990,272 would take you about five thousand, one hundred fifty-five years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 81071990272 cubic inches would be around 360.7 feet tall.

Recreational maths with 81071990272

• 81071990272 backwards is 27209917018
• The number of decimal digits it has is: 11
• The sum of 81071990272's digits is 46
• More coming soon!