81995340720128

Names of 81995340720128

• Cardinal: 81995340720128 can be written as Eighty-one trillion, nine hundred ninety-five billion, three hundred forty million, seven hundred twenty thousand, one hundred twenty-eight.

Scientific notation

• Scientific notation: 8.1995340720128 × 10¹³

Factors of 81995340720128

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 17
• Sum of prime factors: 324

Divisors of 81995340720128

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 4 8 11 16 22 32 44 64 88 121 128 176 242 256 311 352 484 512 622 704 968 1024 1244 1331 1408 1936 2048 2488 2662 2816 3421 3872 4976 5324 5632 6842 7744 9952 10648 11264 13684 15488 19904 21296 22528 27368 30976 37631 39808 42592 54736 61952 75262 79616 85184 96721 109472 123904 150524 159232 170368 193442 218944 247808 301048 318464 340736 386884 413941 437888 602096 636928 681472 773768 827882 875776 1063931 1204192 1362944 1547536 1655764 1751552 2127862 2408384 2725888 3095072 3311528 3503104 4255724 4816768 6190144 6623056 7006208 8511448 9633536 11703241 12380288 13246112 17022896 19267072 23406482 24760576 26492224 30080231 34045792 38534144 46812964 49521152 52984448 60160462 68091584 77068288 93625928 99042304 105968896 120320924 128735651 136183168 187251856 198084608 211937792 240641848 257471302 272366336 330882541 374503712 423875584 481283696 514942604 544732672 661765082 749007424 847751168 962567392 1029885208 1089465344 1323530164 1498014848 1925134784 2059770416 2178930688 2647060328 2996029696 3639707951 3850269568 4119540832 5294120656 5992059392 7279415902 7700539136 8239081664 10588241312 11984118784 14558831804 15401078272 16478163328 21176482624 23968237568 29117663608 30802156544 32956326656 40036787461 42352965248 58235327216 61604313088 65912653312 80073574922 84705930496 116470654432 131825306624 160147149844 169411860992 232941308864 263650613248 320294299688 338823721984 465882617728 640588599376 677647443968 931765235456 1281177198752 1863530470912 2562354397504 3727060941824 5124708795008 7454121883648 10249417590016 20498835180032 40997670360064 81995340720128
• Sum of all divisors σ(n): 180915111861120
• Sum of proper divisors (its aliquot sum) s(n): 98919771140992
• 81995340720128 is an abundant number, because the sum of its proper divisors (98919771140992) is greater than itself. Its abundance is 16924430420864

Bases of 81995340720128

• Binary: 10010101001001100000111001010000010100000000000₂
• Hexadecimal: 0x4A9307282800
• Base-36: T2C50T2WW

Squares and roots of 81995340720128

• 81995340720128 squared (81995340720128²) is 6723235899809880925624336384
• 81995340720128 cubed (81995340720128³) is 551274018346707543914372105288452671537152
• The square root of 81995340720128 is 9055127.8687894849
• The cube root of 81995340720128 is 43443.9919902657

Scales and comparisons

• 81,995,340,720,128 seconds is equal to 2,607,198 years, 10 weeks, 5 days, 5 hours, 22 minutes, 8 seconds.
• To count from 1 to 81,995,340,720,128 would take you about six million, five hundred seventeen thousand, nine hundred ninety-five 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 81995340720128 cubic inches would be around 3620.3 feet tall.

Recreational maths with 81995340720128

• 81995340720128 backwards is 82102704359918
• The number of decimal digits it has is: 14
• The sum of 81995340720128's digits is 59
• More coming soon!