81731285984

Names of 81731285984

• Cardinal: 81731285984 can be written as Eighty-one billion, seven hundred thirty-one million, two hundred eighty-five thousand, nine hundred eighty-four.

Scientific notation

• Scientific notation: 8.1731285984 × 10¹⁰

Factors of 81731285984

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 3714

Divisors of 81731285984

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 4 8 16 32 89 178 356 712 1424 2848 3623 7246 7921 14492 15842 28984 31684 57968 63368 115936 126736 253472 322447 644894 704969 1289788 1409938 2579576 2819876 5159152 5639752 10318304 11279504 22559008 28697783 57395566 114791132 229582264 459164528 918329056 2554102687 5108205374 10216410748 20432821496 40865642992 81731285984
• Sum of all divisors σ(n): 162781889760
• Sum of proper divisors (its aliquot sum) s(n): 81050603776
• 81731285984 is a deficient number, because the sum of its proper divisors (81050603776) is less than itself. Its deficiency is 680682208

Bases of 81731285984

• Binary: 1001100000111100100000111001111100000₂
• Hexadecimal: 0x13079073E0
• Base-36: 11JOP3VK

Squares and roots of 81731285984

• 81731285984 squared (81731285984²) is 6680003108598394848256
• 81731285984 cubed (81731285984³) is 545965244442864418746163419643904
• The square root of 81731285984 is 285886.8412221871
• The cube root of 81731285984 is 4339.7306702833

Scales and comparisons

• 81,731,285,984 seconds is equal to 2,598 years, 41 weeks, 4 days, 22 hours, 59 minutes, 44 seconds.
• To count from 1 to 81,731,285,984 would take you about five thousand, one hundred ninety-seven 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 81731285984 cubic inches would be around 361.6 feet tall.

Recreational maths with 81731285984

• 81731285984 backwards is 48958213718
• The number of decimal digits it has is: 11
• The sum of 81731285984's digits is 56
• More coming soon!