81442298485172709720

Names of 81442298485172709720

• Cardinal: 81442298485172709720 can be written as Eighty-one quintillion, four hundred forty-two quadrillion, two hundred ninety-eight trillion, four hundred eighty-five billion, one hundred seventy-two million, seven hundred nine thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 8.144229848517270972 × 10¹⁹

Factors of 81442298485172709720

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 226228606903257537

Divisors of 81442298485172709720

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 18 20 24 30 36 40 45 60 72 90 120 180 360 226228606903257527 452457213806515054 678685820709772581 904914427613030108 1131143034516287635 1357371641419545162 1809828855226060216 2036057462129317743 2262286069032575270 2714743282839090324 3393429103548862905 4072114924258635486 4524572138065150540 5429486565678180648 6786858207097725810 8144229848517270972 9049144276130301080 10180287310646588715 13573716414195451620 16288459697034541944 20360574621293177430 27147432828390903240 40721149242586354860 81442298485172709720
• Sum of all divisors σ(n): 264687470076811307760
• Sum of proper divisors (its aliquot sum) s(n): 183245171591638598040
• 81442298485172709720 is an abundant number, because the sum of its proper divisors (183245171591638598040) is greater than itself. Its abundance is 101802873106465888320

Bases of 81442298485172709720

• Binary: 1000110101000111101001010101111100011110100000011011010100101011000₂
• Hexadecimal: 0x46A3D2AF8F40DA958
• Base-36: H6RDHCOUMO120

Squares and roots of 81442298485172709720

• 81442298485172709720 squared (81442298485172709720²) is 6632847982547965048360031377047382478400
• 81442298485172709720 cubed (81442298485172709720³) is 540194385201446997615753559083530549272132933078577370048000
• The square root of 81442298485172709720 is 9024538685.4493958515
• The cube root of 81442298485172709720 is 4334609.7877361135

Scales and comparisons

• 81,442,298,485,172,709,720 seconds is equal to 293,274,701,009 years, 3 weeks, 3 days, 15 hours, 30 minutes, 7 seconds.
• To count from 1 to 81,442,298,485,172,709,720 would take you about two hundred ninety-three billion, two hundred seventy-four million, seven hundred one thousand and nine 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 81442298485172709720 cubic inches would be around 361217.5 feet tall.

Recreational maths with 81442298485172709720

• 81442298485172709720 backwards is 02790727158489224418
• 81442298485172709720 is a Harshad number.
• The number of decimal digits it has is: 20
• The sum of 81442298485172709720's digits is 90
• More coming soon!