81998618873036800

Names of 81998618873036800

• Cardinal: 81998618873036800 can be written as Eighty-one quadrillion, nine hundred ninety-eight trillion, six hundred eighteen billion, eight hundred seventy-three million, thirty-six thousand, eight hundred.

Scientific notation

• Scientific notation: 8.19986188730368 × 10¹⁶

Factors of 81998618873036800

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 32
• Sum of prime factors: 289

Divisors of 81998618873036800

• Number of divisors d(n): 936
• Complete list of divisors:
  1 2 4 5 8 10 11 16 20 22 25 32 40 44 50 55 64 80 88 100 110 121 128 160 176 200 220 242 256 271 275 320 352 400 440 484 512 542 550 605 640 704 800 880 968 1024 1084 1100 1210 1280 1331 1355 1408 1600 1760 1936 2048 2168 2200 2420 2560 2662 2710 2816 2981 3025 3200 3520 3872 4096 4336 4400 4840 5120 5324 5420 5632 5962 6050 6400 6655 6775 7040 7744 8192 8672 8800 9680 10240 10648 10840 11264 11924 12100 12800 13310 13550 14080 14905 15488 16384 17344 17600 19360 20480 21296 21680 22528 23848 24200 25600 26620 27100 28160 29810 30976 32768 32791 33275 34688 35200 38720 40960 42592 43360 45056 47696 48400 51200 53240 54200 56320 59620 61952 65536 65582 66550 69376 70400 73441 74525 77440 81920 85184 86720 90112 95392 96800 102400 106480 108400 112640 119240 123904 131072 131164 133100 138752 140800 146882 149050 154880 163840 163955 170368 173440 180224 190784 193600 204800 212960 216800 225280 238480 247808 262144 262328 266200 277504 281600 293764 298100 309760 327680 327910 340736 346880 360448 360701 367205 381568 387200 409600 425920 433600 450560 476960 495616 524288 524656 532400 555008 563200 587528 596200 619520 655360 655820 681472 693760 720896 721402 734410 763136 774400 807851 819200 819775 851840 867200 901120 953920 991232 1048576 1049312 1064800 1110016 1126400 1175056 1192400 1239040 1310720 1311640 1362944 1387520 1441792 1442804 1468820 1526272 1548800 1615702 1638400 1639550 1703680 1734400 1802240 1803505 1836025 1907840 1982464 2097152 2098624 2129600 2220032 2252800 2350112 2384800 2478080 2621440 2623280 2725888 2775040 2883584 2885608 2937640 3052544 3097600 3231404 3276800 3279100 3407360 3468800 3604480 3607010 3672050 3815680 3964928 4039255 4194304 4197248 4259200 4440064 4505600 4700224 4769600 4956160 5242880 5246560 5451776 5550080 5767168 5771216 5875280 6105088 6195200 6462808 6553600 6558200 6814720 6937600 7208960 7214020 7344100 7631360 7929856 8078510 8388608 8394496 8518400 8880128 8886361 9011200 9017525 9400448 9539200 9912320 10485760 10493120 10903552 11100160 11534336 11542432 11750560 12210176 12390400 12925616 13107200 13116400 13629440 13875200 14417920 14428040 14688200 15262720 15859712 16157020 16777216 16788992 17036800 17760256 17772722 18022400 18035050 18800896 19078400 19824640 20196275 20971520 20986240 21807104 22200320 23068672 23084864 23501120 24420352 24780800 25851232 26214400 26232800 27258880 27750400 28835840 28856080 29376400 30525440 31719424 32314040 33554432 33577984 34073600 35520512 35545444 36044800 36070100 37601792 38156800 39649280 40392550 41943040 41972480 43614208 44400640 44431805 46137344 46169728 47002240 48840704 49561600 51702464 52428800 52465600 54517760 55500800 57671680 57712160 58752800 61050880 63438848 64628080 67155968 68147200 71041024 71090888 72089600 72140200 75203584 76313600 79298560 80785100 83886080 83944960 87228416 88801280 88863610 92274688 92339456 94004480 97681408 97749971 99123200 103404928 104857600 104931200 109035520 111001600 115343360 115424320 117505600 122101760 126877696 129256160 134311936 136294400 142082048 142181776 144179200 144280400 150407168 152627200 158597120 161570200 167772160 167889920 174456832 177602560 177727220 184549376 184678912 188008960 195362816 195499942 198246400 206809856 209715200 209862400 218071040 222003200 222159025 230686720 230848640 235011200 244203520 253755392 258512320 268623872 272588800 284164096 284363552 288358400 288560800 300814336 305254400 317194240 323140400 335779840 348913664 355205120 355454440 369098752 369357824 376017920 390725632 390999884 396492800 413619712 419430400 419724800 436142080 444006400 444318050 461373440 461697280 470022400 488407040 488749855 507510784 517024640 537247744 545177600 568328192 568727104 576716800 577121600 601628672 610508800 634388480 646280800 671559680 697827328 710410240 710908880 738715648 752035840 781451264 781999768 792985600 827239424 838860800 839449600 872284160 888012800 888636100 922746880 923394560 940044800 976814080 977499710 1015021568 1034049280 1074495488 1090355200 1136656384 1137454208 1153433600 1154243200 1203257344 1221017600 1268776960 1292561600 1343119360 1395654656 1420820480 1421817760 1477431296 1504071680 1562902528 1563999536 1585971200 1654478848 1678899200 1744568320 1776025600 1777272200 1845493760 1846789120 1880089600 1953628160 1954999420 2030043136 2068098560 2148990976 2180710400 2273312768 2274908416 2306867200 2308486400 2406514688 2442035200 2443749275 2537553920 2585123200 2686238720 2791309312 2841640960 2843635520 2954862592 3008143360 3125805056 3127999072 3171942400 3308957696 3357798400 3489136640 3552051200 3554544400 3693578240 3760179200 3907256320 3909998840 4060086272 4136197120 4297981952 4361420800 4546625536 4549816832 4613734400 4616972800 4813029376 4884070400 4887498550 5075107840 5170246400 5372477440 5582618624 5683281920 5687271040 5909725184 6016286720 6251610112 6255998144 6343884800 6617915392 6715596800 6978273280 7104102400 7109088800 7387156480 7520358400 7814512640 7819997680 8272394240 8595963904 8722841600 9093251072 9099633664 9227468800 9233945600 9626058752 9768140800 9774997100 10150215680 10340492800 10744954880 11165237248 11366563840 11374542080 11819450368 12032573440 12503220224 12511996288 12687769600 13235830784 13431193600 13956546560 14208204800 14218177600 14774312960 15040716800 15629025280 15639995360 16544788480 17191927808 17445683200 18199267328 18467891200 19252117504 19536281600 19549994200 20300431360 20680985600 21489909760 22330474496 22733127680 22749084160 23638900736 24065146880 25006440448 25023992576 25375539200 26471661568 26862387200 27913093120 28416409600 28436355200 29548625920 30081433600 31258050560 31279990720 33089576960 34383855616 34891366400 36398534656 36935782400 38504235008 39072563200 39099988400 41361971200 42979819520 44660948992 45466255360 45498168320 47277801472 48130293760 50012880896 50047985152 50751078400 52943323136 53724774400 55826186240 56832819200 56872710400 59097251840 60162867200 62516101120 62559981440 66179153920 68767711232 69782732800 72797069312 73871564800 77008470016 78145126400 78199976800 82723942400 85959639040 90996336640 94555602944 96260587520 100025761792 100095970304 101502156800 105886646272 107449548800 111652372480 113665638400 113745420800 118194503680 120325734400 125032202240 125119962880 132358307840 137535422464 139565465600 145594138624 147743129600 154016940032 156290252800 156399953600 165447884800 171919278080 181992673280 189111205888 192521175040 200191940608 211773292544 214899097600 223304744960 227331276800 227490841600 236389007360 240651468800 250064404480 250239925760 264716615680 275070844928 279130931200 291188277248 295486259200 308033880064 312580505600 312799907200 330895769600 343838556160 363985346560 378222411776 385042350080 400383881216 423546585088 429798195200 454981683200 472778014720 481302937600 500128808960 500479851520 529433231360 550141689856 558261862400 582376554496 590972518400 616067760128 625161011200 625599814400 661791539200 687677112320 727970693120 756444823552 770084700160 800767762432 847093170176 859596390400 909963366400 945556029440 962605875200 1000959703040 1058866462720 1100283379712 1116523724800 1164753108992 1181945036800 1232135520256 1250322022400 1251199628800 1323583078400 1375354224640 1455941386240 1512889647104 1540169400320 1601535524864 1694186340352 1719192780800 1819926732800 1891112058880 1925211750400 2001919406080 2117732925440 2329506217984 2363890073600 2464271040512 2500644044800 2502399257600 2647166156800 2750708449280 2911882772480 3025779294208 3080338800640 3203071049728 3388372680704 3438385561600 3639853465600 3782224117760 3850423500800 4003838812160 4235465850880 4659012435968 4727780147200 5004798515200 5294332313600 5501416898560 5823765544960 6051558588416 6160677601280 6406142099456 6776745361408 6876771123200 7279706931200 7564448235520 7700847001600 8007677624320 8470931701760 9318024871936 9455560294400 10009597030400 10588664627200 11647531089920 12103117176832 12321355202560 12812284198912 13553490722816 13753542246400 14559413862400 15128896471040 15401694003200 16015355248640 16941863403520 18636049743872 18911120588800 20019194060800 21177329254400 23295062179840 25624568397824 27106981445632 27507084492800 29118827724800 30257792942080 30803388006400 32030710497280 33883726807040 37272099487744 37822241177600 40038388121600 42354658508800 46590124359680 51249136795648 58237655449600 60515585884160 61606776012800 64061420994560 67767453614080 74544198975488 75644482355200 80076776243200 84709317017600 93180248719360 102498273591296 116475310899200 128122841989120 135534907228160 149088397950976 151288964710400 160153552486400 169418634035200 186360497438720 204996547182592 232950621798400 256245683978240 298176795901952 302577929420800 320307104972800 338837268070400 372720994877440 409993094365184 465901243596800 512491367956480 640614209945600 677674536140800 745441989754880 819986188730368 931802487193600 1024982735912960 1281228419891200 1490883979509760 1639972377460736 1863604974387200 2049965471825920 2562456839782400 3279944754921472 3727209948774400 4099930943651840 5124913679564800 7454419897548800 8199861887303680 10249827359129600 16399723774607360 20499654718259200 40999309436518400 81998618873036800
• Sum of all divisors σ(n): 224505372341789496
• Sum of proper divisors (its aliquot sum) s(n): 142506753468752696
• 81998618873036800 is an abundant number, because the sum of its proper divisors (142506753468752696) is greater than itself. Its abundance is 60508134595715896

Bases of 81998618873036800

• Binary: 100100011010100010100111100110110000000000000000000000000₂
• Hexadecimal: 0x123514F36000000
• Base-36: MFE31H3EMF4

Squares and roots of 81998618873036800

• 81998618873036800 squared (81998618873036800²) is 6723773497085546888478054154240000
• 81998618873036800 cubed (81998618873036800³) is 551340140376143570449775745743676109364396032000000
• The square root of 81998618873036800 is 286354009.7030890191
• The cube root of 81998618873036800 is 434445.7094247437

Scales and comparisons

• 81,998,618,873,036,800 seconds is equal to 2,607,302,441 years, 40 weeks, 4 days, 7 hours, 6 minutes, 40 seconds.
• To count from 1 to 81,998,618,873,036,800 would take you about seven billion, eight hundred twenty-one million, nine hundred seven thousand, three hundred twenty-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 81998618873036800 cubic inches would be around 36203.8 feet tall.

Recreational maths with 81998618873036800

• 81998618873036800 backwards is 00863037881689918
• The number of decimal digits it has is: 17
• The sum of 81998618873036800's digits is 85
• More coming soon!