81395159040

Names of 81395159040

• Cardinal: 81395159040 can be written as Eighty-one billion, three hundred ninety-five million, one hundred fifty-nine thousand and forty.

Scientific notation

• Scientific notation: 8.139515904 × 10¹⁰

Factors of 81395159040

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 20
• Sum of prime factors: 90

Divisors of 81395159040

• Number of divisors d(n): 832
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 13 15 16 18 20 24 26 27 30 32 36 39 40 45 48 52 54 60 64 65 67 72 78 80 90 96 104 108 117 120 128 130 134 135 144 156 160 169 180 192 195 201 208 216 234 240 256 260 268 270 288 312 320 335 338 351 360 384 390 402 416 432 468 480 507 512 520 536 540 576 585 603 624 640 670 676 702 720 768 780 804 832 845 864 871 936 960 1005 1014 1024 1040 1072 1080 1152 1170 1206 1248 1280 1340 1352 1404 1440 1521 1536 1560 1608 1664 1690 1728 1742 1755 1809 1872 1920 2010 2028 2048 2080 2144 2160 2197 2304 2340 2412 2496 2535 2560 2613 2680 2704 2808 2880 3015 3042 3072 3120 3216 3328 3380 3456 3484 3510 3618 3744 3840 4020 4056 4096 4160 4288 4320 4355 4394 4563 4608 4680 4824 4992 5070 5120 5226 5360 5408 5616 5760 6030 6084 6144 6240 6432 6591 6656 6760 6912 6968 7020 7236 7488 7605 7680 7839 8040 8112 8320 8576 8640 8710 8788 9045 9126 9216 9360 9648 9984 10140 10240 10452 10720 10816 10985 11232 11323 11520 12060 12168 12288 12480 12864 13065 13182 13312 13520 13824 13936 14040 14472 14976 15210 15360 15678 16080 16224 16640 17152 17280 17420 17576 18090 18252 18432 18720 19296 19773 19968 20280 20480 20904 21440 21632 21970 22464 22646 22815 23040 23517 24120 24336 24960 25728 26130 26364 26624 27040 27648 27872 28080 28944 29952 30420 30720 31356 32160 32448 32955 33280 33969 34304 34560 34840 35152 36180 36504 36864 37440 38592 39195 39546 39936 40560 41808 42880 43264 43940 44928 45292 45630 46080 47034 48240 48672 49920 51456 52260 52728 53248 54080 55296 55744 56160 56615 57888 59319 59904 60840 61440 62712 64320 64896 65910 66560 67938 68608 69120 69680 70304 72360 73008 74880 77184 78390 79092 79872 81120 83616 85760 86528 87880 89856 90584 91260 92160 94068 96480 97344 98865 99840 101907 102912 104520 105456 108160 110592 111488 112320 113230 115776 117585 118638 119808 121680 125424 128640 129792 131820 133120 135876 137216 138240 139360 140608 144720 146016 147199 149760 154368 156780 158184 159744 162240 167232 169845 171520 173056 175760 179712 181168 182520 184320 188136 192960 194688 197730 199680 203814 205824 209040 210912 216320 222976 224640 226460 231552 235170 237276 239616 243360 250848 257280 259584 263640 266240 271752 274432 276480 278720 281216 289440 292032 294398 296595 299520 305721 308736 313560 316368 324480 334464 339690 343040 346112 351520 359424 362336 365040 376272 385920 389376 395460 399360 407628 411648 418080 421824 432640 441597 445952 449280 452920 463104 470340 474552 479232 486720 501696 509535 514560 519168 527280 543504 552960 557440 562432 578880 584064 588796 593190 599040 611442 617472 627120 632736 648960 668928 679380 686080 692224 703040 718848 724672 730080 735995 752544 771840 778752 790920 798720 815256 823296 836160 843648 865280 883194 891904 898560 905840 926208 940680 949104 973440 1003392 1019070 1029120 1038336 1054560 1087008 1114880 1124864 1157760 1168128 1177592 1186380 1198080 1222884 1234944 1254240 1265472 1297920 1324791 1337856 1358760 1372160 1406080 1437696 1449344 1460160 1471990 1505088 1528605 1543680 1557504 1581840 1630512 1672320 1687296 1730560 1766388 1783808 1797120 1811680 1852416 1881360 1898208 1946880 2006784 2038140 2058240 2076672 2109120 2174016 2207985 2229760 2249728 2315520 2336256 2355184 2372760 2396160 2445768 2469888 2508480 2530944 2595840 2649582 2675712 2717520 2812160 2898688 2920320 2943980 3010176 3057210 3087360 3115008 3163680 3261024 3344640 3374592 3461120 3532776 3567616 3594240 3623360 3704832 3762720 3796416 3893760 3974373 4013568 4076280 4116480 4218240 4348032 4415970 4459520 4499456 4631040 4672512 4710368 4745520 4891536 5016960 5061888 5191680 5299164 5351424 5435040 5624320 5797376 5840640 5887960 6020352 6114420 6174720 6230016 6327360 6522048 6623955 6689280 6749184 7065552 7188480 7246720 7409664 7525440 7592832 7787520 7948746 8027136 8152560 8436480 8696064 8831940 8919040 8998912 9262080 9345024 9420736 9491040 9783072 10033920 10123776 10383360 10598328 10702848 10870080 11248640 11594752 11681280 11775920 12040704 12228840 12349440 12654720 13044096 13247910 13378560 13498368 14131104 14493440 15050880 15185664 15575040 15897492 16054272 16305120 16872960 17392128 17663880 17838080 18524160 18690048 18841472 18982080 19566144 19871865 20067840 20247552 21196656 21740160 22497280 23189504 23362560 23551840 24081408 24457680 25309440 26088192 26495820 26757120 26996736 28262208 28986880 30101760 30371328 31150080 31794984 32108544 32610240 33745920 34784256 35327760 37048320 37682944 37964160 39132288 39743730 40135680 40495104 42393312 43480320 44994560 46379008 46725120 47103680 48162816 48915360 50618880 52176384 52991640 53514240 56524416 57973760 60203520 60742656 63589968 65220480 67491840 69568512 70655520 75365888 75928320 78264576 79487460 80271360 80990208 84786624 86960640 93450240 94207360 96325632 97830720 101237760 104352768 105983280 113048832 115947520 120407040 121485312 127179936 130440960 134983680 139137024 141311040 150731776 151856640 156529152 158974920 160542720 169573248 173921280 188414720 195661440 202475520 208705536 211966560 226097664 231895040 240814080 242970624 254359872 260881920 282622080 301463552 303713280 313058304 317949840 339146496 347842560 376829440 391322880 404951040 417411072 423933120 452195328 481628160 508719744 521763840 565244160 602927104 607426560 626116608 635899680 678292992 695685120 753658880 782645760 847866240 904390656 1017439488 1043527680 1130488320 1214853120 1252233216 1271799360 1356585984 1507317760 1565291520 1695732480 1808781312 2034878976 2087055360 2260976640 2543598720 2713171968 3014635520 3130583040 3391464960 4069757952 4521953280 5087197440 5426343936 6261166080 6782929920 8139515904 9043906560 10174394880 13565859840 16279031808 20348789760 27131719680 40697579520 81395159040
• Sum of all divisors σ(n): 318151545600
• Sum of proper divisors (its aliquot sum) s(n): 236756386560
• 81395159040 is an abundant number, because the sum of its proper divisors (236756386560) is greater than itself. Its abundance is 155361227520

Bases of 81395159040

• Binary: 1001011110011100001111001000000000000₂
• Hexadecimal: 0x12F3879000
• Base-36: 11E4KQO0

Squares and roots of 81395159040

• 81395159040 squared (81395159040²) is 6625171915146893721600
• 81395159040 cubed (81395159040³) is 539256921700722799431609483264000
• The square root of 81395159040 is 285298.3684495935
• The cube root of 81395159040 is 4333.7733242123

Scales and comparisons

• 81,395,159,040 seconds is equal to 2,588 years, 5 weeks, 6 days, 14 hours, 24 minutes.
• To count from 1 to 81,395,159,040 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 81395159040 cubic inches would be around 361.1 feet tall.

Recreational maths with 81395159040

• 81395159040 backwards is 04095159318
• 81395159040 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81395159040's digits is 45
• More coming soon!