81408006072

Names of 81408006072

• Cardinal: 81408006072 can be written as Eighty-one billion, four hundred eight million, six thousand and seventy-two.

Scientific notation

• Scientific notation: 8.1408006072 × 10¹⁰

Factors of 81408006072

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 17662

Divisors of 81408006072

• Number of divisors d(n): 160
• Complete list of divisors:
  1 2 3 4 6 8 9 12 18 24 27 31 36 54 62 72 81 93 108 124 162 186 216 233 248 279 324 372 466 558 648 699 744 837 932 1116 1398 1674 1864 2097 2232 2511 2796 3348 4194 5022 5592 6291 6696 7223 8388 10044 12582 14446 16776 17393 18873 20088 21669 25164 28892 34786 37746 43338 50328 52179 57784 65007 69572 75492 86676 104358 130014 139144 150984 156537 173352 195021 208716 260028 313074 390042 417432 469611 520056 539183 585063 626148 780084 939222 1078366 1170126 1252296 1408833 1560168 1617549 1878444 2156732 2340252 2817666 3235098 3756888 4052569 4313464 4680504 4852647 5635332 6470196 8105138 9705294 11270664 12157707 12940392 14557941 16210276 19410588 24315414 29115882 32420552 36473121 38821176 43673823 48630828 58231764 72946242 87347646 97261656 109419363 116463528 125629639 145892484 174695292 218838726 251259278 291784968 328258089 349390584 376888917 437677452 502518556 656516178 753777834 875354904 1005037112 1130666751 1313032356 1507555668 2261333502 2626064712 3015111336 3392000253 4522667004 6784000506 9045334008 10176000759 13568001012 20352001518 27136002024 40704003036 81408006072
• Sum of all divisors σ(n): 236396983680
• Sum of proper divisors (its aliquot sum) s(n): 154988977608
• 81408006072 is an abundant number, because the sum of its proper divisors (154988977608) is greater than itself. Its abundance is 73580971536

Bases of 81408006072

• Binary: 1001011110100010010111001011110111000₂
• Hexadecimal: 0x12F44B97B8
• Base-36: 11EC83I0

Squares and roots of 81408006072

• 81408006072 squared (81408006072²) is 6627263452618788869184
• 81408006072 cubed (81408006072³) is 539512303391534048563817085685248
• The square root of 81408006072 is 285320.8826426835
• The cube root of 81408006072 is 4334.0013197355

Scales and comparisons

• 81,408,006,072 seconds is equal to 2,588 years, 27 weeks, 1 day, 7 hours, 1 minute, 12 seconds.
• To count from 1 to 81,408,006,072 would take you about five thousand, one hundred seventy-seven 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 81408006072 cubic inches would be around 361.2 feet tall.

Recreational maths with 81408006072

• 81408006072 backwards is 27060080418
• 81408006072 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81408006072's digits is 36
• More coming soon!