81940665507840

Names of 81940665507840

• Cardinal: 81940665507840 can be written as Eighty-one trillion, nine hundred forty billion, six hundred sixty-five million, five hundred seven thousand, eight hundred forty.

Scientific notation

• Scientific notation: 8.194066550784 × 10¹³

Factors of 81940665507840

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 20
• Sum of prime factors: 904

Divisors of 81940665507840

• Number of divisors d(n): 756
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 17 18 20 24 30 32 34 36 40 45 48 51 60 64 68 72 80 85 90 96 102 120 128 136 144 153 160 170 180 192 204 240 255 256 272 288 289 306 320 340 360 384 408 480 510 512 544 576 578 612 640 680 720 765 768 816 867 877 960 1020 1024 1088 1152 1156 1224 1280 1360 1440 1445 1530 1536 1632 1734 1754 1920 2040 2048 2176 2304 2312 2448 2560 2601 2631 2720 2880 2890 3060 3072 3264 3468 3508 3840 4080 4096 4335 4352 4385 4608 4624 4896 5120 5202 5262 5440 5760 5780 6120 6144 6528 6936 7016 7680 7893 8160 8192 8670 8704 8770 9216 9248 9792 10240 10404 10524 10880 11520 11560 12240 12288 13005 13056 13155 13872 14032 14909 15360 15786 16320 17340 17408 17540 18432 18496 19584 20480 20808 21048 21760 23040 23120 24480 24576 26010 26112 26310 27744 28064 29818 30720 31572 32640 34680 34816 35080 36864 36992 39168 39465 40960 41616 42096 43520 44727 46080 46240 48960 52020 52224 52620 55488 56128 59636 61440 63144 65280 69360 69632 70160 73728 73984 74545 78336 78930 83232 84192 87040 89454 92160 92480 97920 104040 104448 105240 110976 112256 119272 122880 126288 130560 134181 138720 139264 140320 147968 149090 156672 157860 166464 168384 174080 178908 184320 184960 195840 208080 208896 210480 221952 223635 224512 238544 252576 253453 261120 268362 277440 280640 295936 298180 313344 315720 332928 336768 348160 357816 368640 369920 391680 416160 417792 420960 443904 447270 449024 477088 505152 506906 522240 536724 554880 561280 591872 596360 626688 631440 665856 670905 673536 696320 715632 739840 760359 769129 783360 832320 841920 887808 894540 898048 954176 1010304 1013812 1044480 1073448 1109760 1122560 1183744 1192720 1253376 1262880 1267265 1331712 1341810 1347072 1431264 1479680 1520718 1538258 1566720 1664640 1683840 1775616 1789080 1796096 1908352 2020608 2027624 2088960 2146896 2219520 2245120 2281077 2307387 2367488 2385440 2525760 2534530 2663424 2683620 2694144 2862528 2959360 3041436 3076516 3133440 3329280 3367680 3551232 3578160 3592192 3801795 3816704 3845645 4041216 4055248 4293792 4439040 4490240 4562154 4614774 4770880 5051520 5069060 5326848 5367240 5388288 5725056 5918720 6082872 6153032 6266880 6658560 6735360 6922161 7102464 7156320 7184384 7603590 7633408 7691290 8082432 8110496 8587584 8878080 8980480 9124308 9229548 9541760 10103040 10138120 10653696 10734480 10776576 11405385 11450112 11536935 11837440 12165744 12306064 13075193 13317120 13470720 13844322 14312640 15207180 15266816 15382580 16164864 16220992 17175168 17756160 17960960 18248616 18459096 19083520 20206080 20276240 21307392 21468960 21553152 22810770 22900224 23073870 24331488 24612128 26150386 26634240 26941440 27688644 28625280 30414360 30533632 30765160 32329728 32441984 34350336 34610805 35512320 35921920 36497232 36918192 38167040 39225579 40412160 40552480 42937920 45621540 45800448 46147740 48662976 49224256 52300772 53268480 53882880 55377288 57250560 60828720 61067264 61530320 64659456 64883968 65375965 68700672 69221610 72994464 73836384 76334080 78451158 80824320 81104960 85875840 91243080 91600896 92295480 97325952 98448512 104601544 106536960 107765760 110754576 114501120 117676737 121657440 122134528 123060640 129767936 130751930 137401344 138443220 145988928 147672768 152668160 156902316 161648640 162209920 171751680 182486160 183201792 184590960 194651904 196127895 196897024 209203088 221509152 222278281 229002240 235353474 243314880 246121280 259535872 261503860 274802688 276886440 291977856 295345536 305336320 313804632 323297280 324419840 343503360 364972320 366403584 369181920 389303808 392255790 393794048 418406176 443018304 444556562 458004480 470706948 486629760 492242560 519071744 523007720 549605376 553772880 583955712 588383685 590691072 610672640 627609264 648839680 666834843 687006720 729944640 738363840 778607616 784511580 787588096 836812352 886036608 889113124 916008960 941413896 973259520 984485120 1038143488 1046015440 1099210752 1107545760 1111391405 1167911424 1176767370 1181382144 1255218528 1297679360 1333669686 1374013440 1459889280 1476727680 1557215232 1569023160 1575176192 1673624704 1772073216 1778226248 1832017920 1882827792 1946519040 1968970240 2000504529 2076286976 2092030880 2215091520 2222782810 2335822848 2353534740 2362764288 2510437056 2595358720 2667339372 2748026880 2919778560 2953455360 3114430464 3138046320 3150352384 3334174215 3347249408 3544146432 3556452496 3765655584 3893038080 3937940480 4001009058 4184061760 4430183040 4445565620 4671645696 4707069480 4725528576 5020874112 5190717440 5334678744 5496053760 5839557120 5906910720 6228860928 6276092640 6300704768 6668348430 6694498816 7088292864 7112904992 7531311168 7786076160 7875880960 8002018116 8368123520 8860366080 8891131240 9343291392 9414138960 9451057152 10002522645 10041748224 10381434880 10669357488 11679114240 11813821440 12552185280 13336696860 13388997632 14176585728 14225809984 15062622336 15572152320 15751761920 16004036232 16736247040 17720732160 17782262480 18686582784 18828277920 18902114304 20005045290 20083496448 21338714976 23358228480 23627642880 25104370560 26673393720 26777995264 28353171456 28451619968 30125244672 31144304640 31503523840 32008072464 33472494080 35441464320 35564524960 37656555840 40010090580 40166992896 42677429952 46716456960 47255285760 50208741120 53346787440 53555990528 56706342912 56903239936 60250489344 64016144928 66944988160 70882928640 71129049920 75313111680 80020181160 80333985792 85354859904 93432913920 94510571520 100417482240 106693574880 107111981056 113806479872 120500978688 128032289856 133889976320 141765857280 142258099840 150626223360 160040362320 160667971584 170709719808 200834964480 213387149760 227612959744 241001957376 256064579712 267779952640 283531714560 284516199680 301252446720 320080724640 321335943168 341419439616 401669928960 426774299520 455225919488 482003914752 512129159424 535559905280 569032399360 602504893440 640161449280 682838879232 803339857920 853548599040 910451838976 964007829504 1024258318848 1138064798720 1205009786880 1280322898560 1365677758464 1606679715840 1707097198080 1820903677952 2048516637696 2276129597440 2410019573760 2560645797120 2731355516928 3414194396160 4097033275392 4552259194880 4820039147520 5121291594240 5462711033856 6828388792320 8194066550784 9104518389760 10242583188480 13656777584640 16388133101568 20485166376960 27313555169280 40970332753920 81940665507840
• Sum of all divisors σ(n): 302079381011226
• Sum of proper divisors (its aliquot sum) s(n): 220138715503386
• 81940665507840 is an abundant number, because the sum of its proper divisors (220138715503386) is greater than itself. Its abundance is 138198049995546

Bases of 81940665507840

• Binary: 10010101000011001001100010000101010000000000000₂
• Hexadecimal: 0x4A864C42A000
• Base-36: T1N0SLJ40

Squares and roots of 81940665507840

• 81940665507840 squared (81940665507840²) is 6714272663867719885101465600
• 81940665507840 cubed (81940665507840³) is 550171970478418669037520550188552290304000
• The square root of 81940665507840 is 9052108.3460064705
• The cube root of 81940665507840 is 43434.3335648861

Scales and comparisons

• 81,940,665,507,840 seconds is equal to 2,605,459 years, 36 weeks, 4 days, 6 hours, 24 minutes.
• To count from 1 to 81,940,665,507,840 would take you about six million, five hundred thirteen thousand, six hundred forty-nine 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 81940665507840 cubic inches would be around 3619.5 feet tall.

Recreational maths with 81940665507840

• 81940665507840 backwards is 04870556604918
• The number of decimal digits it has is: 14
• The sum of 81940665507840's digits is 63
• More coming soon!