81378984960

Names of 81378984960

• Cardinal: 81378984960 can be written as Eighty-one billion, three hundred seventy-eight million, nine hundred eighty-four thousand, nine hundred sixty.

Scientific notation

• Scientific notation: 8.137898496 × 10¹⁰

Factors of 81378984960

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 17
• Sum of prime factors: 6499

Divisors of 81378984960

• Number of divisors d(n): 704
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 13 14 15 16 18 20 21 24 26 27 28 30 32 35 36 39 40 42 45 48 52 54 56 60 63 64 65 70 72 78 80 84 90 91 96 104 105 108 112 117 120 126 128 130 135 140 144 156 160 168 180 182 189 192 195 208 210 216 224 234 240 252 256 260 270 273 280 288 312 315 320 336 351 360 364 378 384 390 416 420 432 448 455 468 480 504 512 520 540 546 560 576 585 624 630 640 672 702 720 728 756 768 780 819 832 840 864 896 910 936 945 960 1008 1024 1040 1080 1092 1120 1152 1170 1248 1260 1280 1344 1365 1404 1440 1456 1512 1536 1560 1638 1664 1680 1728 1755 1792 1820 1872 1890 1920 2016 2080 2160 2184 2240 2304 2340 2457 2496 2520 2560 2688 2730 2808 2880 2912 3024 3072 3120 3276 3328 3360 3456 3510 3584 3640 3744 3780 3840 4032 4095 4160 4320 4368 4480 4608 4680 4914 4992 5040 5120 5376 5460 5616 5760 5824 6048 6240 6469 6552 6656 6720 6912 7020 7168 7280 7488 7560 7680 8064 8190 8320 8640 8736 8960 9216 9360 9828 9984 10080 10752 10920 11232 11520 11648 12096 12285 12480 12938 13104 13312 13440 13824 14040 14560 14976 15120 15360 16128 16380 16640 17280 17472 17920 18720 19407 19656 19968 20160 21504 21840 22464 23040 23296 24192 24570 24960 25876 26208 26880 27648 28080 29120 29952 30240 32256 32345 32760 33280 34560 34944 35840 37440 38814 39312 39936 40320 43680 44928 45283 46080 46592 48384 49140 49920 51752 52416 53760 56160 58221 58240 59904 60480 64512 64690 65520 66560 69120 69888 74880 77628 78624 80640 84097 87360 89856 90566 93184 96768 97035 98280 99840 103504 104832 107520 112320 116442 116480 119808 120960 129380 131040 135849 138240 139776 149760 155256 157248 161280 168194 174663 174720 179712 181132 193536 194070 196560 199680 207008 209664 224640 226415 232884 232960 241920 252291 258760 262080 271698 279552 291105 299520 310512 314496 322560 336388 349326 349440 359424 362264 388140 393120 407547 414016 419328 420485 449280 452830 465768 465920 483840 504582 517520 524160 543396 582210 588679 599040 621024 628992 672776 679245 698652 698880 724528 756873 776280 786240 815094 828032 838656 840970 873315 898560 905660 931536 967680 1009164 1035040 1048320 1086792 1164420 1177358 1222641 1242048 1257984 1261455 1345552 1358490 1397304 1397760 1449056 1513746 1552560 1572480 1630188 1656064 1681940 1746630 1766037 1797120 1811320 1863072 2018328 2037735 2070080 2096640 2173584 2270619 2328840 2354716 2445282 2484096 2515968 2522910 2691104 2716980 2794608 2898112 2943395 3027492 3105120 3144960 3260376 3312128 3363880 3493260 3532074 3622640 3726144 3784365 4036656 4075470 4140160 4193280 4347168 4541238 4657680 4709432 4890564 4968192 5045820 5298111 5382208 5433960 5589216 5796224 5886790 6054984 6113205 6210240 6289920 6520752 6624256 6727760 6986520 7064148 7245280 7452288 7568730 8073312 8150940 8280320 8694336 8830185 9082476 9315360 9418864 9781128 9936384 10091640 10596222 10764416 10867920 11178432 11353095 11592448 11773580 12109968 12226410 12420480 12579840 13041504 13455520 13973040 14128296 14490560 14904576 15137460 15894333 16146624 16301880 16560640 17388672 17660370 18164952 18630720 18837728 19562256 19872768 20183280 21192444 21528832 21735840 22356864 22706190 23184896 23547160 24219936 24452820 24840960 26083008 26490555 26911040 27946080 28256592 28981120 29809152 30274920 31788666 32293248 32603760 33121280 34777344 35320740 36329904 37261440 37675456 39124512 40366560 42384888 43057664 43471680 44713728 45412380 46369792 47094320 48439872 48905640 49681920 52166016 52981110 53822080 55892160 56513184 57962240 59618304 60549840 63577332 64586496 65207520 69554688 70641480 72659808 74522880 75350912 78249024 79471665 80733120 84769776 86115328 86943360 89427456 90824760 94188640 96879744 97811280 99363840 104332032 105962220 107644160 111784320 113026368 115924480 121099680 127154664 129172992 130415040 139109376 141282960 145319616 149045760 150701824 156498048 158943330 161466240 169539552 173886720 178854912 181649520 188377280 193759488 195622560 208664064 211924440 215288320 223568640 226052736 231848960 242199360 254309328 258345984 260830080 282565920 290639232 298091520 301403648 312996096 317886660 322932480 339079104 347773440 363299040 376754560 387518976 391245120 417328128 423848880 430576640 447137280 452105472 484398720 508618656 521660160 565131840 581278464 602807296 625992192 635773320 645864960 678158208 695546880 726598080 753509120 775037952 782490240 847697760 894274560 904210944 968797440 1017237312 1043320320 1130263680 1162556928 1251984384 1271546640 1291729920 1356316416 1453196160 1507018240 1564980480 1695395520 1808421888 1937594880 2034474624 2086640640 2260527360 2325113856 2543093280 2712632832 2906392320 3014036480 3129960960 3390791040 3875189760 4068949248 4521054720 5086186560 5425265664 5812784640 6259921920 6781582080 8137898496 9042109440 10172373120 11625569280 13563164160 16275796992 20344746240 27126328320 40689492480 81378984960
• Sum of all divisors σ(n): 356001139200
• Sum of proper divisors (its aliquot sum) s(n): 274622154240
• 81378984960 is an abundant number, because the sum of its proper divisors (274622154240) is greater than itself. Its abundance is 193243169280

Bases of 81378984960

• Binary: 1001011110010100100001100010000000000₂
• Hexadecimal: 0x12F290C400
• Base-36: 11DUY2O0

Squares and roots of 81378984960

• 81378984960 squared (81378984960²) is 6622539193119906201600
• 81378984960 cubed (81378984960³) is 538935517393915382256617127936000
• The square root of 81378984960 is 285270.0211378687
• The cube root of 81378984960 is 4333.4862496465

Scales and comparisons

• 81,378,984,960 seconds is equal to 2,587 years, 31 weeks, 1 day, 9 hours, 36 minutes.
• To count from 1 to 81,378,984,960 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 81378984960 cubic inches would be around 361.1 feet tall.

Recreational maths with 81378984960

• 81378984960 backwards is 06948987318
• 81378984960 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81378984960's digits is 63
• More coming soon!