81440709120540

Names of 81440709120540

• Cardinal: 81440709120540 can be written as Eighty-one trillion, four hundred forty billion, seven hundred nine million, one hundred twenty thousand, five hundred forty.

Scientific notation

• Scientific notation: 8.144070912054 × 10¹³

Factors of 81440709120540

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 973090

Divisors of 81440709120540

• Number of divisors d(n): 720
• Complete list of divisors:
  1 2 3 4 5 6 7 9 10 11 12 14 15 18 20 21 22 27 28 30 33 35 36 42 44 45 54 55 60 61 63 66 70 77 81 84 90 99 105 108 110 121 122 126 132 135 140 154 162 165 180 183 189 198 210 220 231 242 244 252 270 297 305 308 315 324 330 363 366 378 385 396 405 420 427 462 484 495 540 549 567 594 605 610 630 660 671 693 726 732 756 770 810 847 854 891 915 924 945 990 1089 1098 1134 1155 1188 1210 1220 1260 1281 1342 1386 1452 1485 1540 1620 1647 1694 1708 1782 1815 1830 1890 1980 2013 2079 2135 2178 2196 2268 2310 2420 2541 2562 2684 2745 2772 2835 2970 3267 3294 3355 3388 3465 3564 3630 3660 3780 3843 4026 4158 4235 4270 4356 4455 4620 4697 4941 5082 5124 5445 5490 5670 5940 6039 6237 6405 6534 6588 6710 6930 7260 7381 7623 7686 8052 8235 8316 8470 8540 8910 9394 9801 9882 10065 10164 10395 10890 10980 11340 11529 12078 12474 12705 12810 13068 13420 13860 14091 14762 15246 15372 16335 16470 16940 17820 18117 18788 19215 19602 19764 20130 20790 21780 22143 22869 23058 23485 24156 24705 24948 25410 25620 28182 29524 30195 30492 31185 32670 32940 34587 36234 36905 38115 38430 39204 40260 41580 42273 44286 45738 46116 46970 49005 49410 50820 51667 54351 56364 57645 60390 62370 65340 66429 68607 69174 70455 72468 73810 76230 76860 84546 88572 90585 91476 93940 98010 98820 103334 108702 110715 114345 115290 120780 124740 126819 132858 137214 138348 140910 147620 152460 155001 169092 172935 181170 196020 199287 206668 211365 217404 221430 228690 230580 253638 258335 265716 271755 274428 281820 310002 332145 343035 345870 362340 380457 398574 422730 442860 457380 465003 507276 516670 543510 597861 620004 634095 664290 686070 691740 760914 775005 797148 845460 930006 973001 996435 1033340 1087020 1195722 1268190 1328580 1372140 1395009 1521828 1550010 1860012 1902285 1946002 1992870 2325015 2391444 2536380 2790018 2919003 2989305 3100020 3804570 3892004 3985740 4185027 4650030 4865005 5580036 5838006 5978610 6811007 6975045 7609140 8370054 8757009 9300060 9730010 10703011 11676012 11957220 13622014 13950090 14595015 16740108 17514018 19460020 20433021 20925135 21406022 26271027 27244028 27900180 29190030 32109033 34055035 35028036 40866042 41850270 42812044 43785045 52542054 53515055 58380060 59353061 61299063 64218066 68110070 74921077 78813081 81732084 83700540 87570090 96327099 102165105 105084108 107030110 117733121 118706122 122598126 128436132 131355135 136220140 149842154 157626162 160545165 175140180 178059183 183897189 192654198 204330210 214060220 224763231 235466242 237412244 245196252 262710270 288981297 296765305 299684308 306495315 315252324 321090330 353199363 356118366 367794378 374605385 385308396 394065405 408660420 415471427 449526462 470932484 481635495 525420540 534177549 551691567 577962594 588665605 593530610 612990630 642180660 652883671 674289693 706398726 712236732 735588756 749210770 788130810 824131847 830942854 866943891 890295915 899052924 919485945 963270990 1059598089 1068355098 1103383134 1123816155 1155925188 1177331210 1187061220 1225981260 1246414281 1305767342 1348579386 1412797452 1444906485 1498421540 1576261620 1602532647 1648263694 1661885708 1733887782 1765996815 1780591830 1838971890 1926541980 1958651013 2022869079 2077357135 2119196178 2136710196 2206766268 2247632310 2354662420 2472395541 2492828562 2611534684 2670887745 2697158772 2758457835 2889812970 3178794267 3205065294 3264418355 3296527388 3371448465 3467775564 3531993630 3561183660 3677943780 3739242843 3917302026 4045738158 4120659235 4154714270 4238392356 4334719455 4495264620 4570185697 4807597941 4944791082 4985657124 5297990445 5341775490 5516915670 5779625940 5875953039 6068607237 6232071405 6357588534 6410130588 6528836710 6742896930 7063987260 7181720381 7417186623 7478485686 7834604052 8012663235 8091476316 8241318470 8309428540 8669438910 9140371394 9536382801 9615195882 9793255065 9889582164 10114345395 10595980890 10683550980 11033831340 11217728529 11751906078 12137214474 12361977705 12464142810 12715177068 13057673420 13485793860 13710557091 14363440762 14834373246 14956971372 15893971335 16025326470 16482636940 17338877820 17627859117 18280742788 18696214215 19072765602 19230391764 19586510130 20228690790 21191961780 21545161143 22251559869 22435457058 22850928485 23503812156 24037989705 24274428948 24723955410 24928285620 27421114182 28726881524 29379765195 29668746492 30343036185 31787942670 32050652940 33653185587 35255718234 35908601905 37085933115 37392428430 38145531204 39173020260 40457381580 41131671273 43090322286 44503119738 44870914116 45701856970 47681914005 48075979410 49447910820 50272042667 52883577351 54842228364 56088642645 58759530390 60686072370 63575885340 64635483429 66754679607 67306371174 68552785455 70511436468 71817203810 74171866230 74784856860 82263342546 86180644572 88139295585 89006239476 91403713940 95363828010 96151958820 100544085334 105767154702 107725805715 111257799345 112177285290 117519060780 121372144740 123395013819 129270966858 133509359214 134612742348 137105570910 143634407620 148343732460 150816128001 164526685092 168265927935 176278591170 190727656020 193906450287 201088170668 205658356365 211534309404 215451611430 222515598690 224354570580 246790027638 251360213335 258541933716 264417886755 267018718428 274211141820 301632256002 323177417145 333773398035 336531855870 352557182340 370185041457 387812900574 411316712730 430903222860 445031197380 452448384003 493580055276 502720426670 528835773510 581719350861 603264512004 616975069095 646354834290 667546796070 673063711740 740370082914 754080640005 775625801148 822633425460 904896768006 969532251435 1005440853340 1057671547020 1163438701722 1233950138190 1292709668580 1335093592140 1357345152009 1480740165828 1508161280010 1809793536012 1850925207285 1939064502870 2262241920015 2326877403444 2467900276380 2714690304018 2908596754305 3016322560020 3701850414570 3878129005740 4072035456027 4524483840030 5429380608036 5817193508610 6786725760045 7403700829140 8144070912054 9048967680060 11634387017220 13573451520090 16288141824108 20360177280135 27146903040180 40720354560270 81440709120540
• Sum of all divisors σ(n): 326198313346752
• Sum of proper divisors (its aliquot sum) s(n): 244757604226212
• 81440709120540 is an abundant number, because the sum of its proper divisors (244757604226212) is greater than itself. Its abundance is 163316895105672

Bases of 81440709120540

• Binary: 10010100001000111100100100010011001001000011100₂
• Hexadecimal: 0x4A11E489921C
• Base-36: SV9CFH1R0

Squares and roots of 81440709120540

• 81440709120540 squared (81440709120540²) is 6632589102056407140249891600
• 81440709120540 cubed (81440709120540³) is 540162759776639445856492925762866333464000
• The square root of 81440709120540 is 9024450.6270764205
• The cube root of 81440709120540 is 43345.8159059353

Scales and comparisons

• 81,440,709,120,540 seconds is equal to 2,589,562 years, 33 weeks, 1 day, 9 minutes.
• To count from 1 to 81,440,709,120,540 would take you about six million, four hundred seventy-three thousand, nine hundred 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 81440709120540 cubic inches would be around 3612.2 feet tall.

Recreational maths with 81440709120540

• 81440709120540 backwards is 04502190704418
• 81440709120540 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 81440709120540's digits is 45
• More coming soon!