81090755072

Names of 81090755072

• Cardinal: 81090755072 can be written as Eighty-one billion, ninety million, seven hundred fifty-five thousand and seventy-two.

Scientific notation

• Scientific notation: 8.1090755072 × 10¹⁰

Factors of 81090755072

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 32256

Divisors of 81090755072

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 4 8 16 17 32 34 64 68 128 136 256 272 289 512 544 578 1088 1156 2176 2312 4352 4624 4913 8704 9248 9826 18496 19652 32237 36992 39304 64474 73984 78608 128948 147968 157216 257896 314432 515792 548029 628864 1031584 1096058 1257728 2063168 2192116 2515456 4126336 4384232 8252672 8768464 9316493 16505344 17536928 18632986 35073856 37265972 70147712 74531944 140295424 149063888 158380381 280590848 298127776 316760762 596255552 633521524 1192511104 1267043048 2385022208 2534086096 4770044416 5068172192 10136344384 20272688768 40545377536 81090755072
• Sum of all divisors σ(n): 172152854280
• Sum of proper divisors (its aliquot sum) s(n): 91062099208
• 81090755072 is an abundant number, because the sum of its proper divisors (91062099208) is greater than itself. Its abundance is 9971344136

Bases of 81090755072

• Binary: 1001011100001011000101011101000000000₂
• Hexadecimal: 0x12E162BA00
• Base-36: 1193CB28

Squares and roots of 81090755072

• 81090755072 squared (81090755072²) is 6575710558147093725184
• 81090755072 cubed (81090755072³) is 533229334295070391417523822133248
• The square root of 81090755072 is 284764.3851888785
• The cube root of 81090755072 is 4328.3640517737

Scales and comparisons

• 81,090,755,072 seconds is equal to 2,578 years, 22 weeks, 4 days, 9 hours, 44 minutes, 32 seconds.
• To count from 1 to 81,090,755,072 would take you about five thousand, one hundred fifty-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 81090755072 cubic inches would be around 360.7 feet tall.

Recreational maths with 81090755072

• 81090755072 backwards is 27055709018
• The number of decimal digits it has is: 11
• The sum of 81090755072's digits is 44
• More coming soon!