81393320800

Names of 81393320800

• Cardinal: 81393320800 can be written as Eighty-one billion, three hundred ninety-three million, three hundred twenty thousand, eight hundred.

Scientific notation

• Scientific notation: 8.13933208 × 10¹⁰

Factors of 81393320800

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 282

Divisors of 81393320800

• Number of divisors d(n): 576
• Complete list of divisors:
  1 2 4 5 8 10 11 16 17 20 22 25 32 34 40 44 50 55 68 71 79 80 85 88 97 100 110 136 142 158 160 170 176 187 194 200 220 272 275 284 316 340 352 355 374 388 395 400 425 440 485 544 550 568 632 680 710 748 776 781 790 800 850 869 880 935 970 1067 1100 1136 1207 1264 1343 1360 1420 1496 1552 1562 1580 1649 1700 1738 1760 1775 1870 1940 1975 2134 2200 2272 2414 2425 2528 2686 2720 2840 2992 3104 3124 3160 3298 3400 3476 3550 3740 3880 3905 3950 4268 4345 4400 4675 4828 4850 5335 5372 5609 5680 5984 6035 6248 6320 6596 6715 6800 6887 6952 7100 7480 7663 7760 7810 7900 8245 8536 8690 8800 9350 9656 9700 10670 10744 11218 11360 12070 12496 12640 13192 13277 13430 13600 13774 13904 14200 14773 14960 15326 15520 15620 15800 16490 17072 17380 18139 18700 19312 19400 19525 21340 21488 21725 22436 24140 24992 26384 26554 26675 26860 27548 27808 28045 28400 29546 29920 30175 30652 31240 31600 32980 33575 34144 34435 34760 36278 37400 38315 38624 38800 39050 41225 42680 42976 43450 44872 48280 52768 53108 53350 53720 55096 56090 56800 59092 60350 61304 61699 62480 63200 65960 66385 67150 68870 69520 72556 73865 74800 75757 76630 77600 78100 82450 84293 85360 86900 89744 90695 95353 96560 106216 106700 107440 110192 112180 117079 118184 120700 122608 123398 124960 130271 131920 132770 134300 137740 139040 140225 145112 147730 149600 151514 153260 156200 164900 168586 170720 172175 173800 179488 181390 190706 191575 193120 212432 213400 214880 220384 224360 234158 236368 241400 245216 246796 260542 263840 265540 268600 275480 280450 290224 295460 303028 306520 308495 312400 329800 331925 337172 344350 347600 362780 369325 378785 381412 383150 421465 424864 426800 448720 453475 468316 472736 476765 482800 493592 521084 531080 537200 544073 550960 560900 580448 585395 590920 606056 613040 616990 624800 651355 659600 663850 674344 688700 695200 725560 738650 757570 762824 766300 842930 853600 897440 906950 936632 953530 965600 987184 1042168 1048883 1062160 1074400 1088146 1101920 1121800 1170790 1181840 1212112 1226080 1233980 1287869 1302710 1319200 1327700 1348688 1377400 1432981 1451120 1477300 1515140 1525648 1532600 1542475 1685860 1813900 1873264 1893925 1907060 1974368 2084336 2097766 2107325 2124320 2176292 2243600 2341580 2363680 2383825 2424224 2467960 2575738 2605420 2655400 2697376 2720365 2754800 2865962 2902240 2926975 2954600 3030280 3051296 3065200 3084950 3256775 3371720 3627800 3746528 3787850 3814120 4168672 4195532 4214650 4352584 4487200 4683160 4767650 4935920 5151476 5210840 5244415 5310800 5440730 5509600 5731924 5853950 5909200 5984803 6060560 6130400 6169900 6439345 6513550 6743440 7164905 7255600 7575700 7628240 8391064 8429300 8705168 9249241 9366320 9535300 9871840 10302952 10421680 10488830 10621600 10881460 11463848 11707900 11818400 11969606 12121120 12339800 12878690 13027100 13486880 13601825 14329810 14511200 15151400 15256480 16782128 16858600 17410336 18498482 18732640 19070600 20605904 20843360 20977660 21762920 22927696 23415800 23939212 24679600 25757380 26054200 26222075 27203650 28659620 29924015 30302800 32196725 33564256 33717200 35824525 36996964 38141200 41211808 41955320 43525840 45855392 46246205 46831600 47878424 49359200 51514760 52108400 52444150 54407300 57319240 59848030 60605600 64393450 67434400 71649050 73993928 76282400 83910640 87051680 92492410 93663200 95756848 101741651 103029520 104216800 104888300 108814600 114638480 119696060 128786900 143298100 147987856 149620075 167821280 184984820 191513696 203483302 206059040 209776600 217629200 229276960 231231025 239392120 257573800 286596200 295975712 299240150 369969640 406966604 419553200 435258400 462462050 478784240 508708255 515147600 573192400 598480300 739939280 813933208 839106400 924924100 957568480 1017416510 1030295200 1146384800 1196960600 1479878560 1627866416 1849848200 2034833020 2393921200 2543541275 3255732832 3699696400 4069666040 4787842400 5087082550 7399392800 8139332080 10174165100 16278664160 20348330200 40696660400 81393320800
• Sum of all divisors σ(n): 238124759040
• Sum of proper divisors (its aliquot sum) s(n): 156731438240
• 81393320800 is an abundant number, because the sum of its proper divisors (156731438240) is greater than itself. Its abundance is 75338117440

Bases of 81393320800

• Binary: 1001011110011011010111000001101100000₂
• Hexadecimal: 0x12F36B8360
• Base-36: 11E3HC9S

Squares and roots of 81393320800

• 81393320800 squared (81393320800²) is 6624872670851712640000
• 81393320800 cubed (81393320800³) is 539220386557786256136934912000000
• The square root of 81393320800 is 285295.1468216731
• The cube root of 81393320800 is 4333.7406991129

Scales and comparisons

• 81,393,320,800 seconds is equal to 2,588 years, 2 weeks, 6 days, 7 hours, 46 minutes, 40 seconds.
• To count from 1 to 81,393,320,800 would take you about five thousand, one hundred seventy-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 81393320800 cubic inches would be around 361.1 feet tall.

Recreational maths with 81393320800

• 81393320800 backwards is 00802339318
• The number of decimal digits it has is: 11
• The sum of 81393320800's digits is 37
• More coming soon!