31891389513072805

Names of 31891389513072805

• Cardinal: 31891389513072805 can be written as Thirty-one quadrillion, eight hundred ninety-one trillion, three hundred eighty-nine billion, five hundred thirteen million, seventy-two thousand, eight hundred five.

Scientific notation

• Scientific notation: 3.1891389513072805 × 10¹⁶

Factors of 31891389513072805

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 1155085

Divisors of 31891389513072805

• Number of divisors d(n): 32
• Complete list of divisors:
  1 5 37 185 7673 19927 38365 99635 283901 737299 1127443 1419505 3686495 5637215 41715391 152899871 208576955 764499355 5657295227 8650870139 22466556661 28286476135 43254350695 112332783305 320082195143 831262596457 1600410975715 4156312982285 172385889259853 861929446299265 6378277902614561 31891389513072805
• Sum of all divisors σ(n): 39311112649077504
• Sum of proper divisors (its aliquot sum) s(n): 7419723136004699
• 31891389513072805 is a deficient number, because the sum of its proper divisors (7419723136004699) is less than itself. Its deficiency is 24471666377068106

Bases of 31891389513072805

• Binary: 1110001010011010000110010111111010100100000000010100101₂
• Hexadecimal: 0x714D0CBF5200A5
• Base-36: 8Q0JY34T291

Squares and roots of 31891389513072805

• 31891389513072805 squared (31891389513072805²) is 1017060725074530082395993230568025
• 31891389513072805 cubed (31891389513072805³) is 32435479741800091919215655589204943805273330060125
• The square root of 31891389513072805 is 178581604.6323719341
• The cube root of 31891389513072805 is 317120.6190901567

Scales and comparisons

• 31,891,389,513,072,805 seconds is equal to 1,014,047,539 years, 50 weeks, 3 days, 10 hours, 53 minutes, 25 seconds.
• To count from 1 to 31,891,389,513,072,805 would take you about three billion, forty-two million, one hundred forty-two thousand, six hundred nineteen 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 31891389513072805 cubic inches would be around 26426.7 feet tall.

Recreational maths with 31891389513072805

• 31891389513072805 backwards is 50827031598319813
• The number of decimal digits it has is: 17
• The sum of 31891389513072805's digits is 73
• More coming soon!