81138376093309742

Names of 81138376093309742

• Cardinal: 81138376093309742 can be written as Eighty-one quadrillion, one hundred thirty-eight trillion, three hundred seventy-six billion, ninety-three million, three hundred nine thousand, seven hundred forty-two.

Scientific notation

• Scientific notation: 8.1138376093309742 × 10¹⁶

Factors of 81138376093309742

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 117001076

Divisors of 81138376093309742

• Number of divisors d(n): 32
• Complete list of divisors:
  1 2 37 74 107 214 3959 7918 87649 175298 3243013 6486026 9378443 18756886 116913281 233826562 347002391 694004782 4325791397 8651582794 12509721067 25019442134 462859679479 925719358958 10247332166369 20494664332738 379151290155653 758302580311306 1096464541801483 2192929083602966 40569188046654871 81138376093309742
• Sum of all divisors σ(n): 126166594147797600
• Sum of proper divisors (its aliquot sum) s(n): 45028218054487858
• 81138376093309742 is a deficient number, because the sum of its proper divisors (45028218054487858) is less than itself. Its deficiency is 36110158038821884

Bases of 81138376093309742

• Binary: 100100000010000101110110001010100101100011001101100101110₂
• Hexadecimal: 0x12042EC54B19B2E
• Base-36: M6X5JEB60J2

Squares and roots of 81138376093309742

• 81138376093309742 squared (81138376093309742²) is 6583436075059377870424691952106564
• 81138376093309742 cubed (81138376093309742³) is 534169312244430745613881119064033818380603843346488
• The square root of 81138376093309742 is 284847987.6939799307
• The cube root of 81138376093309742 is 432921.1171691349

Scales and comparisons

• 81,138,376,093,309,742 seconds is equal to 2,579,949,382 years, 15 weeks, 1 day, 1 hour, 9 minutes, 2 seconds.
• To count from 1 to 81,138,376,093,309,742 would take you about seven billion, seven hundred thirty-nine million, eight hundred forty-eight thousand, one hundred forty-six 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 81138376093309742 cubic inches would be around 36076.8 feet tall.

Recreational maths with 81138376093309742

• 81138376093309742 backwards is 24790339067383118
• 81138376093309742 is a Harshad number.
• The number of decimal digits it has is: 17
• The sum of 81138376093309742's digits is 74
• More coming soon!