81821419680

Names of 81821419680

• Cardinal: 81821419680 can be written as Eighty-one billion, eight hundred twenty-one million, four hundred nineteen thousand, six hundred eighty.

Scientific notation

• Scientific notation: 8.182141968 × 10¹⁰

Factors of 81821419680

• Number of distinct prime factors ω(n): 8
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 291

Divisors of 81821419680

• Number of divisors d(n): 1152
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 11 12 13 14 15 16 20 21 22 24 26 28 30 32 33 35 39 40 42 44 48 52 55 56 60 65 66 70 77 78 80 84 88 91 96 104 105 110 112 113 120 121 130 132 137 140 143 154 156 160 165 168 176 182 195 208 210 220 224 226 231 240 242 260 264 273 274 280 286 308 312 330 336 339 352 363 364 385 390 411 416 420 429 440 452 455 462 480 484 520 528 546 548 560 565 572 605 616 624 660 672 678 685 715 726 728 770 780 791 822 840 847 858 880 904 910 924 959 968 1001 1040 1056 1092 1096 1120 1130 1144 1155 1210 1232 1243 1248 1320 1356 1365 1370 1430 1452 1456 1469 1507 1540 1560 1573 1582 1644 1680 1694 1695 1716 1760 1781 1808 1815 1820 1848 1918 1936 2002 2055 2080 2145 2184 2192 2260 2288 2310 2373 2420 2464 2486 2541 2640 2712 2730 2740 2860 2877 2904 2912 2938 3003 3014 3080 3120 3146 3164 3288 3360 3388 3390 3432 3562 3616 3630 3640 3696 3729 3836 3872 3955 4004 4110 4235 4290 4368 4384 4407 4520 4521 4576 4620 4719 4746 4795 4840 4972 5005 5082 5280 5343 5424 5460 5480 5720 5754 5808 5876 6006 6028 6160 6215 6240 6292 6328 6576 6776 6780 6864 7124 7260 7280 7345 7392 7458 7535 7672 7865 7910 8008 8220 8470 8580 8701 8736 8814 8905 9040 9042 9240 9438 9492 9590 9680 9944 10010 10164 10283 10549 10686 10848 10920 10960 11011 11440 11508 11616 11752 11865 12012 12056 12320 12430 12467 12584 12656 12705 13152 13552 13560 13673 13728 14248 14385 14520 14560 14690 14916 15015 15070 15344 15481 15730 15820 16016 16159 16440 16577 16940 17160 17402 17628 17810 18080 18084 18480 18645 18876 18984 19180 19360 19591 19888 20020 20328 20566 21098 21372 21840 21920 22022 22035 22605 22880 23016 23504 23595 23730 24024 24112 24860 24934 25168 25312 25410 26103 26715 27104 27120 27346 28496 28770 29040 29380 29832 30030 30140 30688 30849 30962 31460 31640 31647 32032 32318 32880 33033 33154 33880 34320 34804 35256 35620 36168 36960 37290 37401 37752 37968 38360 39182 39776 40040 40656 41019 41132 42196 42744 43505 43680 44044 44070 45210 46032 46443 47008 47190 47460 48048 48224 48477 49720 49731 49868 50336 50820 51415 52206 52745 53430 54240 54692 55055 56992 57540 58080 58760 58773 59664 60060 60280 61698 61924 62335 62920 63280 63294 64636 65760 66066 66308 67760 68365 68640 69608 70512 71240 72336 74580 74802 75504 75936 76720 77405 78364 80080 80795 81312 82038 82264 82885 84392 85488 87010 88088 88140 90420 92064 92886 94380 94920 95711 96096 96954 97955 99440 99462 99736 101640 102830 104412 105490 106860 108367 109384 110110 113113 115080 116039 117520 117546 119328 120120 120560 123396 123848 124670 125840 126560 126588 129272 130515 132132 132616 135520 136730 137137 139216 141024 142480 144672 149160 149604 151008 153440 154245 154810 156728 158235 160160 161590 164076 164528 165165 165770 168784 170291 170976 174020 176176 176280 177749 180840 185772 187005 188760 189840 191422 193908 195910 198880 198924 199472 201253 203280 205095 205660 208824 210980 213720 215501 216734 218768 220220 226226 230160 232078 232215 235040 235092 240240 241120 242385 246792 247696 248655 249340 251680 253176 258544 261030 264264 265232 273460 274274 278432 284960 287133 293865 298320 299208 308490 309620 313456 316470 323180 325101 328152 329056 330330 331540 337568 339339 340582 348040 348117 352352 352560 355498 361680 371544 374010 377520 379680 382844 387816 391820 397848 398944 402506 406560 410190 411320 411411 417648 421960 427440 431002 433468 437536 440440 452452 460320 464156 464430 470184 478555 480480 484770 493584 495392 497310 498680 506352 510873 517088 522060 528528 530464 533247 541835 546920 548548 565565 574266 580195 587730 596640 598416 603759 616980 619240 626912 632940 646360 646503 650202 656304 660660 663080 678678 681164 685685 696080 696234 705120 710996 723360 743088 748020 755040 765688 775632 783640 795696 805012 820380 822640 822822 835296 843920 851455 854880 862004 866936 880880 888745 904904 928312 928860 940368 957110 969540 987168 994620 997360 1006265 1012704 1021746 1044120 1057056 1066494 1077505 1083670 1093840 1097096 1131130 1148532 1160390 1175460 1192037 1196832 1207518 1233960 1238480 1244243 1265880 1292720 1293006 1300404 1312608 1321320 1326160 1357356 1362328 1371370 1392160 1392468 1408771 1421992 1435665 1486176 1496040 1508507 1531376 1551264 1567280 1591392 1610024 1625505 1640760 1645280 1645644 1687840 1696695 1702910 1724008 1733872 1740585 1761760 1777490 1809808 1856624 1857720 1873201 1880736 1914220 1939080 1989240 1994720 2012530 2043492 2057055 2088240 2132988 2155010 2167340 2187680 2194192 2213783 2262260 2297064 2320780 2350920 2384074 2415036 2467920 2476960 2488486 2531760 2554365 2585440 2586012 2600808 2642640 2652320 2666235 2714712 2724656 2742740 2784936 2817542 2843984 2871330 2992080 3017014 3018795 3062752 3134560 3220048 3232515 3251010 3281520 3291288 3393390 3405820 3448016 3467744 3481170 3554980 3576111 3619616 3713248 3715440 3732729 3746402 3828440 3878160 3978480 4025060 4086984 4114110 4176480 4226313 4265976 4310020 4334680 4388384 4427566 4524520 4525521 4594128 4641560 4701840 4768148 4830072 4935840 4976972 5063520 5108730 5172024 5201616 5285280 5332470 5429424 5449312 5485480 5569872 5619603 5635084 5687968 5742660 5960185 5984160 6034028 6037590 6221215 6440096 6465030 6502020 6563040 6582576 6641349 6786780 6811640 6896032 6962340 7043855 7109960 7152222 7430880 7465458 7492804 7542535 7656880 7756320 7956960 8050120 8173968 8228220 8452626 8531952 8620040 8669360 8855132 9049040 9051042 9188256 9283120 9366005 9403680 9536296 9660144 9953944 10217460 10344048 10403232 10664940 10858848 10970960 11068915 11139744 11239206 11270168 11485320 11920370 12068056 12075180 12442430 12930060 13004040 13112407 13165152 13282698 13573560 13623280 13924680 14087710 14219920 14304444 14930916 14985608 15085070 15313760 15496481 16100240 16347936 16456440 16905252 17063904 17240080 17338720 17710264 17880555 18098080 18102084 18566240 18663645 18732010 19072592 19320288 19907888 20434920 20688096 21131565 21329880 21941920 22137830 22478412 22540336 22627605 22970640 23840740 24136112 24150360 24351613 24884860 25860120 26008080 26224814 26565396 27147120 27246560 27849360 28098015 28175420 28439840 28608888 29861832 29971216 30170140 30992962 32200480 32912880 33206745 33810504 34480160 35420528 35761110 36204168 37327290 37464020 38145184 39337221 39815776 40869840 42263130 42659760 44275660 44956824 45080672 45255210 45941280 46489443 47681480 48272224 48300720 48703226 49769720 51720240 52016160 52449628 53130792 54294240 55698720 56196030 56350840 57217776 59723664 59942432 60340280 61985924 65562035 65825760 66413490 67621008 70841056 71522220 72408336 73054839 74654580 74928040 77482405 78674442 81739680 84526260 85319520 88551320 89913648 90510420 92978886 95362960 96601440 97406452 99539440 103440480 104899256 106261584 112392060 112701680 114435552 119447328 120680560 121758065 123971848 131124070 132826980 135242016 143044440 144816672 146109678 149309160 149856080 154964810 157348884 169052520 170461291 177102640 179827296 181020840 185957772 190725920 194812904 196686105 199078880 209798512 212523168 224784120 225403360 232447215 241361120 243516130 247943696 262248140 265653960 286088880 292219356 298618320 299712160 309929620 314697768 338105040 340922582 354205280 362041680 365274195 371915544 389625808 393372210 419597024 449568240 464894430 487032260 495887392 511383873 524496280 531307920 572177760 584438712 597236640 619859240 629395536 676210080 681845164 724083360 730548390 743831088 779251616 786744420 852306455 899136480 929788860 974064520 1022767746 1048992560 1062615840 1168877424 1239718480 1258791072 1363690328 1461096780 1487662176 1573488840 1704612910 1859577720 1948129040 2045535492 2097985120 2337754848 2479436960 2556919365 2727380656 2922193560 3146977680 3409225820 3719155440 3896258080 4091070984 5113838730 5454761312 5844387120 6293955360 6818451640 7438310880 8182141968 10227677460 11688774240 13636903280 16364283936 20455354920 27273806560 40910709840 81821419680
• Sum of all divisors σ(n): 354327934464
• Sum of proper divisors (its aliquot sum) s(n): 272506514784
• 81821419680 is an abundant number, because the sum of its proper divisors (272506514784) is greater than itself. Its abundance is 190685095104

Bases of 81821419680

• Binary: 1001100001100111011111100100010100000₂
• Hexadecimal: 0x130CEFC8A0
• Base-36: 11L6CZHC

Squares and roots of 81821419680

• 81821419680 squared (81821419680²) is 6694744718450691302400
• 81821419680 cubed (81821419680³) is 547773517258817452439796191232000
• The square root of 81821419680 is 286044.4365478901
• The cube root of 81821419680 is 4341.3253768825

Scales and comparisons

• 81,821,419,680 seconds is equal to 2,601 years, 34 weeks, 5 days, 4 hours, 8 minutes.
• To count from 1 to 81,821,419,680 would take you about five thousand, two hundred three 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 81821419680 cubic inches would be around 361.8 feet tall.

Recreational maths with 81821419680

• 81821419680 backwards is 08691412818
• 81821419680 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81821419680's digits is 48
• More coming soon!