81236421843920

Names of 81236421843920

• Cardinal: 81236421843920 can be written as Eighty-one trillion, two hundred thirty-six billion, four hundred twenty-one million, eight hundred forty-three thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 8.123642184392 × 10¹³

Factors of 81236421843920

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 134750

Divisors of 81236421843920

• Number of divisors d(n): 480
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 19 20 23 28 35 38 40 46 49 56 70 76 80 92 95 98 112 115 133 140 152 161 184 190 196 230 245 266 280 304 322 353 368 380 392 437 460 490 532 560 644 665 706 760 784 805 874 920 931 980 1064 1127 1288 1330 1412 1520 1610 1748 1765 1840 1862 1960 2128 2185 2254 2471 2576 2660 2824 3059 3220 3496 3530 3724 3920 4370 4508 4655 4942 5320 5635 5648 6118 6440 6707 6992 7060 7448 8119 8740 9016 9310 9884 10640 11270 12236 12355 12880 13414 14120 14896 15295 16238 17297 17480 18032 18620 19768 21413 22540 24472 24710 26828 28240 30590 32476 33535 34594 34960 37240 39536 40595 42826 45080 46949 48944 49420 53656 56833 61180 64952 67070 69188 74480 81190 85652 86485 90160 93898 98840 107065 107312 113666 122360 129904 134140 134341 138376 154261 162380 171304 172970 187796 197680 214130 227332 234745 244720 268280 268682 276752 284165 308522 324760 328643 342608 345940 375592 397831 428260 454664 469490 536560 537364 568330 617044 649520 657286 671705 691880 751184 771305 795662 856520 909328 938980 940387 1074728 1079827 1136660 1234088 1314572 1343410 1383760 1542610 1591324 1643215 1713040 1877960 1880774 1989155 2149456 2159654 2273320 2468176 2552479 2629144 2686820 3085220 3089843 3182648 3286430 3755920 3761548 3978310 4319308 4546640 4701935 5104958 5258288 5373640 5399135 6170440 6179686 6365296 6572860 6582709 7523096 7558789 7956620 8638616 9403870 10209916 10747280 10798270 12340880 12359372 12762395 13145720 13165418 15046192 15117578 15449215 15913240 17277232 17867353 18807740 20419832 21596540 21628901 24718744 25524790 26291440 26330836 30235156 30898430 31826480 32913545 35734706 37615480 37793945 40839664 43193080 43257802 47422373 49437488 51049580 52661672 58707017 60470312 61796860 65827090 71469412 75230960 75587890 86386160 86515604 89336765 94844746 102099160 105323344 108144505 117414034 120940624 123593720 125071471 131654180 142938824 151175780 151402307 173031208 178673530 189689492 204198320 216289010 234828068 237111865 247187440 250142942 263308360 285877648 293535085 302351560 302804614 331956611 346062416 357347060 379378984 410949119 432578020 469656136 474223730 500285884 526616720 587070170 604703120 605609228 625357355 663913222 714694120 757011535 758757968 821898238 865156040 901025087 939312272 948447460 1000571768 1090714579 1174140340 1211218456 1250714710 1327826444 1429388240 1514023070 1643796476 1659783055 1730312080 1802050174 1896894920 2001143536 2054745595 2181429158 2323696277 2348280680 2422436912 2501429420 2655652888 2876643833 3028046140 3287592952 3319566110 3604100348 3793789840 4109491190 4362858316 4505125435 4647392554 4696561360 5002858840 5311305776 5453572895 5753287666 6056092280 6307175609 6575185904 6639132220 7208200696 7635002053 8218982380 8725716632 9010250870 9294785108 10005717680 10907145790 11506575332 11618481385 12112184560 12614351218 13278264440 14383219165 14416401392 15270004106 16437964760 17451433264 18020501740 18589570216 20723577001 21814291580 23013150664 23236962770 25228702436 26556528880 28766438330 30540008212 31535878045 32875929520 36041003480 37179140432 38175010265 41447154002 43628583160 44150229263 46026301328 46473925540 50457404872 53445014371 57532876660 61080016424 63071756090 72082006960 76350020530 82894308004 87257166320 88300458526 92947851080 100914809744 103617885005 106890028742 115065753320 122160032848 126143512180 145065039007 152700041060 165788616008 176600917052 185895702160 207235770010 213780057484 220751146315 230131506640 252287024360 267225071855 290130078014 305400082120 331577232016 353201834104 414471540020 427560114968 441502292630 504574048720 534450143710 580260156028 610800164240 706403668208 725325195035 828943080040 855120229936 883004585260 1015455273049 1068900287420 1160520312056 1450650390070 1657886160080 1766009170520 2030910546098 2137800574840 2321040624112 2901300780140 3532018341040 4061821092196 4275601149680 5077276365245 5802601560280 8123642184392 10154552730490 11605203120560 16247284368784 20309105460980 40618210921960 81236421843920
• Sum of all divisors σ(n): 242016016769280
• Sum of proper divisors (its aliquot sum) s(n): 160779594925360
• 81236421843920 is an abundant number, because the sum of its proper divisors (160779594925360) is greater than itself. Its abundance is 79543173081440

Bases of 81236421843920

• Binary: 10010011110001001010100000100010001101111010000₂
• Hexadecimal: 0x49E254111BD0
• Base-36: SSNHW3QA8

Squares and roots of 81236421843920

• 81236421843920 squared (81236421843920²) is 6599356234003322532840966400
• 81236421843920 cubed (81236421843920³) is 536108086923797137676739024432402764288000
• The square root of 81236421843920 is 9013124.9766060605
• The cube root of 81236421843920 is 43309.5424290889

Scales and comparisons

• 81,236,421,843,920 seconds is equal to 2,583,066 years, 48 weeks, 3 days, 22 hours, 25 minutes, 20 seconds.
• To count from 1 to 81,236,421,843,920 would take you about six million, four hundred fifty-seven thousand, six hundred sixty-seven 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 81236421843920 cubic inches would be around 3609.1 feet tall.

Recreational maths with 81236421843920

• 81236421843920 backwards is 02934812463218
• The number of decimal digits it has is: 14
• The sum of 81236421843920's digits is 53
• More coming soon!