81121393982466180

Names of 81121393982466180

• Cardinal: 81121393982466180 can be written as Eighty-one quadrillion, one hundred twenty-one trillion, three hundred ninety-three billion, nine hundred eighty-two million, four hundred sixty-six thousand, one hundred eighty.

Scientific notation

• Scientific notation: 8.112139398246618 × 10¹⁶

Factors of 81121393982466180

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 64382058716260

Divisors of 81121393982466180

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 5 6 7 9 10 12 14 15 18 20 21 28 30 35 36 42 45 60 63 70 84 90 105 126 140 180 210 252 315 420 630 1260 64382058716243 128764117432486 193146176148729 257528234864972 321910293581215 386292352297458 450674411013701 579438528446187 643820587162430 772584704594916 901348822027402 965730880743645 1158877056892374 1287641174324860 1352023233041103 1802697644054804 1931461761487290 2253372055068505 2317754113784748 2704046466082206 2897192642230935 3862923522974580 4056069699123309 4506744110137010 5408092932164412 5794385284461870 6760116165205515 8112139398246618 9013488220274020 11588770568923740 13520232330411030 16224278796493236 20280348495616545 27040464660822060 40560696991233090 81121393982466180
• Sum of all divisors σ(n): 281220832472553792
• Sum of proper divisors (its aliquot sum) s(n): 200099438490087612
• 81121393982466180 is an abundant number, because the sum of its proper divisors (200099438490087612) is greater than itself. Its abundance is 118978044507621432

Bases of 81121393982466180

• Binary: 100100000001100110111101001100000000000100110100010000100₂
• Hexadecimal: 0x120337A60026884
• Base-36: M6R4TX8U3D0

Squares and roots of 81121393982466180

• 81121393982466180 squared (81121393982466180²) is 6580680561658500159217274843792400
• 81121393982466180 cubed (81121393982466180³) is 533833980515056016419308240947884696604015941032000
• The square root of 81121393982466180 is 284818177.0576909299
• The cube root of 81121393982466180 is 432890.9118675011

Scales and comparisons

• 81,121,393,982,466,180 seconds is equal to 2,579,409,403 years, 36 weeks, 1 day, 5 hours, 3 minutes.
• To count from 1 to 81,121,393,982,466,180 would take you about seven billion, seven hundred thirty-eight million, two hundred twenty-eight thousand, two hundred eleven 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 81121393982466180 cubic inches would be around 36074.2 feet tall.

Recreational maths with 81121393982466180

• 81121393982466180 backwards is 08166428939312118
• The number of decimal digits it has is: 17
• The sum of 81121393982466180's digits is 72
• More coming soon!