81389883120

Names of 81389883120

• Cardinal: 81389883120 can be written as Eighty-one billion, three hundred eighty-nine million, eight hundred eighty-three thousand, one hundred twenty.

Scientific notation

• Scientific notation: 8.138988312 × 10¹⁰

Factors of 81389883120

• Number of distinct prime factors ω(n): 8
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 603

Divisors of 81389883120

• Number of divisors d(n): 640
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 12 13 14 15 16 20 21 24 26 28 30 35 39 40 42 48 52 56 60 65 70 78 80 84 91 97 103 104 105 112 120 130 140 156 168 182 194 195 206 208 210 240 260 273 280 291 309 312 336 364 373 388 390 412 420 455 485 515 520 546 560 582 618 624 679 721 728 746 776 780 824 840 910 970 1030 1040 1092 1119 1164 1236 1261 1339 1358 1365 1442 1455 1456 1492 1545 1552 1560 1648 1680 1820 1865 1940 2037 2060 2163 2184 2238 2328 2472 2522 2611 2678 2716 2730 2884 2910 2984 3090 3120 3395 3605 3640 3730 3783 3880 4017 4074 4120 4326 4368 4476 4656 4849 4944 5044 5222 5356 5432 5460 5595 5768 5820 5968 6180 6305 6695 6790 7210 7280 7460 7566 7760 7833 8034 8148 8240 8652 8827 8952 9373 9698 9991 10088 10185 10444 10712 10815 10864 10920 11190 11536 11640 12360 12610 13055 13390 13580 14420 14547 14920 15132 15666 16068 16296 17304 17654 17904 18746 18915 19396 19982 20085 20176 20370 20888 21424 21630 21840 22380 23280 24245 24720 25220 26110 26481 26780 27160 28119 28840 29094 29840 29973 30264 31332 32136 32592 33943 34608 35308 36181 37492 37830 38419 38792 39165 39964 40170 40740 41776 43260 44135 44760 46865 48490 49955 50440 52220 52962 53560 54320 56238 57680 58188 59946 60528 62664 64272 67886 69937 70616 72362 72735 74984 75660 76838 77584 78330 79928 80340 81480 86520 88270 89520 93730 96980 99910 100880 101829 104440 105924 107120 108543 112476 115257 116376 119892 125328 129883 132405 135772 139874 140595 141232 144724 145470 149865 149968 151320 153676 156660 159856 160680 162960 169715 173040 176540 180905 187460 192095 193960 199820 203658 208880 209811 211848 217086 224952 230514 232752 239784 253267 259766 264810 268933 271544 279748 281190 289448 290940 299730 302640 307352 313320 321360 339430 349685 353080 361810 374920 384190 387920 389649 399640 407316 419622 423696 434172 449904 461028 470353 479568 499447 506534 509145 519532 529620 537866 542715 543088 559496 562380 576285 578896 581880 599460 614704 626640 649415 678860 699370 706160 723620 749840 759801 768380 779298 799280 806799 814632 839244 868344 909181 922056 940706 998894 1013068 1018290 1039064 1049055 1059240 1075732 1085430 1118992 1124760 1152570 1163760 1198920 1266335 1298830 1344665 1357720 1398740 1411059 1447240 1498341 1519602 1536760 1558596 1613598 1629264 1678488 1736688 1818362 1844112 1881412 1948245 1997788 2026136 2036580 2078128 2098110 2118480 2151464 2170860 2249520 2305140 2351765 2397840 2497235 2532670 2597660 2689330 2715440 2727543 2797480 2822118 2894480 2996682 3039204 3073520 3117192 3227196 3292471 3356976 3496129 3636724 3726643 3762824 3799005 3896490 3995576 4033995 4052272 4073160 4196220 4302928 4341720 4545905 4610280 4703530 4994470 5065340 5195320 5378660 5455086 5594960 5644236 5993364 6078408 6234384 6454392 6584942 6992258 7055295 7273448 7453286 7491705 7525648 7598010 7792980 7991152 8067990 8146320 8392440 8683440 9091810 9220560 9407060 9877413 9988940 10130680 10390640 10488387 10757320 10910172 11179929 11288472 11986728 12156816 12908784 13169884 13637715 13984516 14110590 14546896 14906572 14983410 15196020 15585960 16135980 16462355 16784880 17480645 18183620 18633215 18814120 19754826 19977880 20261360 20976774 21514640 21820344 22359858 22576944 23973456 26086501 26339768 27275430 27969032 28221180 29813144 29966820 30392040 31171920 32271960 32924710 34961290 36367240 37266430 37628240 39509652 39955760 41953548 43640688 44719716 48446359 49387065 52173002 52441935 52679536 54550860 55899645 55938064 56442360 59626288 59933640 60784080 64543920 65849420 69922580 72734480 74532860 78259503 79019304 83907096 89439432 96892718 98774130 104346004 104883870 109101720 111799290 112884720 119867280 130432505 131698840 139845160 145339077 149065720 156519006 158038608 167814192 178878864 193785436 197548260 208692008 209767740 218203440 223598580 242231795 260865010 263397680 279690320 290678154 298131440 313038012 339124513 387570872 391297515 395096520 417384016 419535480 447197160 484463590 521730020 581356308 626076024 678249026 726695385 775141744 782595030 790193040 839070960 894394320 968927180 1017373539 1043460040 1162712616 1252152048 1356498052 1453390770 1565190060 1695622565 1937854360 2034747078 2086920080 2325425232 2712996104 2906781540 3130380120 3391245130 3875708720 4069494156 5086867695 5425992208 5813563080 6260760240 6782490260 8138988312 10173735390 11627126160 13564980520 16277976624 20347470780 27129961040 40694941560 81389883120
• Sum of all divisors σ(n): 317630337024
• Sum of proper divisors (its aliquot sum) s(n): 236240453904
• 81389883120 is an abundant number, because the sum of its proper divisors (236240453904) is greater than itself. Its abundance is 154850570784

Bases of 81389883120

• Binary: 1001011110011001101110000111011110000₂
• Hexadecimal: 0x12F3370EF0
• Base-36: 11E1FNQO

Squares and roots of 81389883120

• 81389883120 squared (81389883120²) is 6624313074287260934400
• 81389883120 cubed (81389883120³) is 539152066866528044755757987328000
• The square root of 81389883120 is 285289.1219797909
• The cube root of 81389883120 is 4333.6796858205

Scales and comparisons

• 81,389,883,120 seconds is equal to 2,587 years, 49 weeks, 1 day, 12 hours, 52 minutes.
• To count from 1 to 81,389,883,120 would take you about five thousand, one hundred seventy-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 81389883120 cubic inches would be around 361.1 feet tall.

Recreational maths with 81389883120

• 81389883120 backwards is 02138898318
• The number of decimal digits it has is: 11
• The sum of 81389883120's digits is 51
• More coming soon!