81333891072

Names of 81333891072

• Cardinal: 81333891072 can be written as Eighty-one billion, three hundred thirty-three million, eight hundred ninety-one thousand and seventy-two.

Scientific notation

• Scientific notation: 8.1333891072 × 10¹⁰

Factors of 81333891072

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 19
• Sum of prime factors: 5015

Divisors of 81333891072

• Number of divisors d(n): 390
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 16 18 21 24 27 28 32 36 42 48 49 54 56 63 64 72 81 84 96 98 108 112 126 128 144 147 162 168 189 192 196 216 224 252 256 288 294 324 336 378 384 392 432 441 448 504 512 567 576 588 648 672 756 768 784 864 882 896 1008 1024 1134 1152 1176 1296 1323 1344 1512 1536 1568 1728 1764 1792 2016 2048 2268 2304 2352 2592 2646 2688 3024 3072 3136 3456 3528 3584 3969 4032 4096 4536 4608 4704 5003 5184 5292 5376 6048 6144 6272 6912 7056 7168 7938 8064 9072 9216 9408 10006 10368 10584 10752 12096 12288 12544 13824 14112 14336 15009 15876 16128 18144 18432 18816 20012 20736 21168 21504 24192 25088 27648 28224 28672 30018 31752 32256 35021 36288 36864 37632 40024 41472 42336 43008 45027 48384 50176 55296 56448 60036 63504 64512 70042 72576 75264 80048 82944 84672 86016 90054 96768 100352 105063 110592 112896 120072 127008 129024 135081 140084 145152 150528 160096 165888 169344 180108 193536 200704 210126 225792 240144 245147 254016 258048 270162 280168 290304 301056 315189 320192 331776 338688 360216 387072 405243 420252 451584 480288 490294 508032 540324 560336 580608 602112 630378 640384 677376 720432 735441 774144 810486 840504 903168 945567 960576 980588 1016064 1080648 1120672 1161216 1260756 1280768 1354752 1440864 1470882 1620972 1681008 1806336 1891134 1921152 1961176 2032128 2161296 2206323 2241344 2322432 2521512 2561536 2709504 2836701 2881728 2941764 3241944 3362016 3782268 3842304 3922352 4064256 4322592 4412646 4482688 5043024 5123072 5419008 5673402 5763456 5883528 6483888 6618969 6724032 7564536 7684608 7844704 8128512 8645184 8825292 8965376 10086048 10246144 11346804 11526912 11767056 12967776 13237938 13448064 15129072 15369216 15689408 16257024 17290368 17650584 17930752 19856907 20172096 20492288 22693608 23053824 23534112 25935552 26475876 26896128 30258144 30738432 31378816 34580736 35301168 35861504 39713814 40344192 45387216 46107648 47068224 51871104 52951752 53792256 60516288 61476864 62757632 69161472 70602336 71723008 79427628 80688384 90774432 92215296 94136448 103742208 105903504 107584512 121032576 125515264 138322944 141204672 143446016 158855256 161376768 181548864 184430592 188272896 207484416 211807008 215169024 242065152 251030528 276645888 282409344 317710512 322753536 363097728 376545792 414968832 423614016 430338048 484130304 502061056 553291776 564818688 635421024 645507072 726195456 753091584 829937664 847228032 968260608 1004122112 1129637376 1270842048 1291014144 1452390912 1506183168 1659875328 1694456064 1936521216 2259274752 2541684096 2904781824 3012366336 3388912128 3873042432 4518549504 5083368192 5809563648 6777824256 9037099008 10166736384 11619127296 13555648512 20333472768 27111297024 40666945536 81333891072
• Sum of all divisors σ(n): 282692608308
• Sum of proper divisors (its aliquot sum) s(n): 201358717236
• 81333891072 is an abundant number, because the sum of its proper divisors (201358717236) is greater than itself. Its abundance is 120024826164

Bases of 81333891072

• Binary: 1001011101111111000001011000000000000₂
• Hexadecimal: 0x12EFE0B000
• Base-36: 11D43K00

Squares and roots of 81333891072

• 81333891072 squared (81333891072²) is 6615201836911961309184
• 81333891072 cubed (81333891072³) is 538040105622691769975049969205248
• The square root of 81333891072 is 285190.9729847703
• The cube root of 81333891072 is 4332.6856750299

Scales and comparisons

• 81,333,891,072 seconds is equal to 2,586 years, 8 weeks, 4 days, 11 hours, 31 minutes, 12 seconds.
• To count from 1 to 81,333,891,072 would take you about five thousand, one hundred seventy-two 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 81333891072 cubic inches would be around 361.1 feet tall.

Recreational maths with 81333891072

• 81333891072 backwards is 27019833318
• The number of decimal digits it has is: 11
• The sum of 81333891072's digits is 45
• More coming soon!