81842860356009985

Names of 81842860356009985

• Cardinal: 81842860356009985 can be written as Eighty-one quadrillion, eight hundred forty-two trillion, eight hundred sixty billion, three hundred fifty-six million, nine thousand, nine hundred eighty-five.

Scientific notation

• Scientific notation: 8.1842860356009985 × 10¹⁶

Factors of 81842860356009985

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 8846001

Divisors of 81842860356009985

• Number of divisors d(n): 32
• Complete list of divisors:
  1 5 17 85 311 1555 5287 26435 365069 1825345 6206173 8480599 31030865 42402995 113536459 144170183 567682295 720850915 1930119803 2637466289 9650599015 13187331445 44836926913 224184634565 3096003796331 15480018981655 52632064537627 263160322688135 962857180658941 4814285903294705 16368572071201997 81842860356009985
• Sum of all divisors σ(n): 104323241984832000
• Sum of proper divisors (its aliquot sum) s(n): 22480381628822015
• 81842860356009985 is a deficient number, because the sum of its proper divisors (22480381628822015) is less than itself. Its deficiency is 59362478727187970

Bases of 81842860356009985

• Binary: 100100010110000111010010111011010111011000000000000000001₂
• Hexadecimal: 0x122C3A5DAEC0001
• Base-36: MDUVEZZXMO1

Squares and roots of 81842860356009985

• 81842860356009985 squared (81842860356009985²) is 6698253791253350848657309419700225
• 81842860356009985 cubed (81842860356009985³) is 548204249666662449787839929643432753291335806746625
• The square root of 81842860356009985 is 286081911.9692994239
• The cube root of 81842860356009985 is 434170.4547447065

Scales and comparisons

• 81,842,860,356,009,985 seconds is equal to 2,602,349,802 years, 38 weeks, 13 hours, 26 minutes, 25 seconds.
• To count from 1 to 81,842,860,356,009,985 would take you about seven billion, eight hundred seven million, forty-nine thousand, four hundred eight 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 81842860356009985 cubic inches would be around 36180.9 feet tall.

Recreational maths with 81842860356009985

• 81842860356009985 backwards is 58990065306824818
• The number of decimal digits it has is: 17
• The sum of 81842860356009985's digits is 82
• More coming soon!