81761825137440

Names of 81761825137440

• Cardinal: 81761825137440 can be written as Eighty-one trillion, seven hundred sixty-one billion, eight hundred twenty-five million, one hundred thirty-seven thousand, four hundred forty.

Scientific notation

• Scientific notation: 8.176182513744 × 10¹³

Factors of 81761825137440

• Number of distinct prime factors ω(n): 8
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 92493

Divisors of 81761825137440

• Number of divisors d(n): 768
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 12 14 15 16 20 21 24 28 30 31 32 35 40 42 48 56 60 62 67 70 80 84 93 96 105 112 120 124 127 134 140 155 160 168 186 201 210 217 224 240 248 254 268 280 310 335 336 372 381 402 420 434 465 469 480 496 508 536 560 620 635 651 670 672 744 762 804 840 868 889 930 938 992 1005 1016 1072 1085 1120 1240 1270 1302 1340 1407 1488 1524 1608 1680 1736 1778 1860 1876 1905 2010 2032 2077 2144 2170 2345 2480 2540 2604 2667 2680 2814 2976 3048 3216 3255 3360 3472 3556 3720 3752 3810 3937 4020 4064 4154 4340 4445 4690 4960 5080 5208 5334 5360 5628 6096 6231 6432 6510 6944 7035 7112 7440 7504 7620 7874 8040 8308 8509 8680 8890 9380 10160 10385 10416 10668 10720 11256 11811 12192 12462 13020 13335 14070 14224 14539 14880 15008 15240 15748 16080 16616 17018 17360 17780 18760 19685 20320 20770 20832 21336 22512 23622 24924 25527 26040 26670 27559 28140 28448 29078 30480 31155 31496 32160 33232 34036 34720 35560 37520 39370 41540 42545 42672 43617 45024 47244 49848 51054 52080 53340 55118 56280 58156 59055 59563 60960 62310 62992 66464 68072 71120 72695 75040 78740 82677 83080 85090 85344 87234 92251 94488 99696 102108 104160 106680 110236 112560 116312 118110 119126 124620 125984 127635 136144 137795 142240 145390 157480 165354 166160 170180 174468 178689 184502 188976 199392 204216 213360 218085 220472 225120 232624 236220 238252 249240 255270 263779 272288 275590 276753 290780 297815 314960 330708 332320 340360 348936 357378 369004 377952 408432 413385 426720 436170 440944 461255 465248 472440 476504 498480 510540 527558 551180 553506 581560 595630 629920 645757 661416 680720 697872 714756 738008 791337 816864 826770 872340 881888 893445 922510 944880 953008 996960 1021080 1055116 1102360 1107012 1163120 1191260 1291514 1318895 1322832 1361440 1383765 1395744 1429512 1476016 1582674 1653540 1744680 1786890 1845020 1846453 1889760 1906016 1937271 2042160 2110232 2204720 2214024 2326240 2382520 2583028 2637790 2645664 2767530 2859024 2859781 2952032 3165348 3228785 3307080 3489360 3573780 3690040 3692906 3874542 3956685 4084320 4220464 4409440 4428048 4765040 5166056 5275580 5535060 5539359 5718048 5719562 6180817 6330696 6457570 6614160 6978720 7147560 7380080 7385812 7749084 7913370 8440928 8579343 8856096 9232265 9530080 9686355 10332112 10551160 11070120 11078718 11439124 11715877 12361634 12661392 12915140 13228320 14295120 14298905 14760160 14771624 15498168 15826740 17158686 18464530 18542451 19372710 20018467 20664224 21102320 22140240 22157436 22878248 23431754 24723268 25322784 25830280 27696795 28590240 28597810 29543248 30904085 30996336 31653480 34317372 35147631 36929060 37084902 38745420 40036934 42204640 42896715 43265719 44280480 44314872 45756496 46863508 49446536 51660560 55393590 57195620 58579385 59086496 60055401 61808170 61992672 63306960 68634744 70295262 73858120 74169804 77490840 80073868 82011139 85793430 86531438 88629744 91512992 92712255 93727016 98893072 100092335 103321120 110787180 114391240 117158770 120110802 123616340 126613920 129797157 137269488 140590524 147716240 148339608 154981680 160147736 164022278 171586860 173062876 175738155 177259488 185424510 187454032 191605327 197786144 200184670 216328595 221574360 228782480 234317540 240221604 246033417 247232680 259594314 274538976 281181048 295432480 296679216 300277005 309963360 320295472 328044556 343173720 346125752 351476310 363192187 370849020 374908064 383210654 400369340 410055695 432657190 443148720 457564960 468635080 480443208 492066834 494465360 519188628 562362096 574815981 593358432 600554010 640590944 648985785 656089112 686347440 692251504 702952620 726384374 741698040 766421308 784963759 800738680 820111390 865314380 886297440 937270160 958026635 960886416 984133668 988930720 1038377256 1089576561 1124724192 1149631962 1201108020 1230167085 1297971570 1312178224 1341237289 1372694880 1384503008 1405905240 1452768748 1483396080 1532842616 1569927518 1601477360 1640222780 1730628760 1815960935 1874540320 1916053270 1921772832 1968267336 2076754512 2179153122 2299263924 2354891277 2402216040 2460334170 2542345309 2595943140 2624356448 2682474578 2811810480 2874079905 2905537496 2966792160 3065685232 3139855036 3202954720 3280445560 3461257520 3631921870 3832106540 3924818795 3936534672 4023711867 4153509024 4358306244 4598527848 4709782554 4804432080 4920668340 5084690618 5191886280 5364949156 5447882805 5494746313 5623620960 5748159810 5811074992 6131370464 6279710072 6560891120 6706186445 6922515040 7263843740 7627035927 7664213080 7849637590 7873069344 8047423734 8716612488 9197055696 9419565108 9608864160 9841336680 10169381236 10383772560 10729898312 10895765610 10989492626 11496319620 11622149984 11774456385 12559420144 12711726545 13121782240 13412372890 14527687480 15254071854 15328426160 15699275180 16094847468 16484238939 17433224976 18394111392 18839130216 19682673360 20118559335 20338762472 20767545120 21459796624 21791531220 21978985252 22992639240 23548912770 24333876529 25118840288 25423453090 26824745780 27473731565 29055374960 30508143708 30656852320 31398550360 32189694936 32968477878 34866449952 37678260432 38135179635 39365346720 40237118670 40677524944 42919593248 43583062440 43957970504 45985278480 47097825540 48667753058 50846906180 53649491560 54947463130 58110749920 61016287416 62797100720 64379389872 65936955756 73001629587 75356520864 76270359270 80474237340 81355049888 82421194695 87166124880 87915941008 91970556960 94195651080 97335506116 101693812360 107298983120 109894926260 121669382645 122032574832 125594201440 128758779744 131873911512 146003259174 152540718540 160948474680 164842389390 170337135703 174332249760 175831882016 188391302160 194671012232 203387624720 214597966240 219789852520 243338765290 244065149664 263747823024 292006518348 305081437080 321896949360 329684778780 340674271406 365008147935 376782604320 389342024464 406775249440 439579705040 486677530580 511011407109 527495646048 584013036696 610162874160 643793898720 659369557560 681348542812 730016295870 778684048928 851685678515 879159410080 973355061160 1022022814218 1168026073392 1220325748320 1318739115120 1362697085624 1460032591740 1703371357030 1946710122320 2044045628436 2336052146784 2555057035545 2637478230240 2725394171248 2920065183480 3406742714060 3893420244640 4088091256872 5110114071090 5450788342496 5840130366960 6813485428120 8176182513744 10220228142180 11680260733920 13626970856240 16352365027488 20440456284360 27253941712480 40880912568720 81761825137440
• Sum of all divisors σ(n): 310803878117376
• Sum of proper divisors (its aliquot sum) s(n): 229042052979936
• 81761825137440 is an abundant number, because the sum of its proper divisors (229042052979936) is greater than itself. Its abundance is 147280227842496

Bases of 81761825137440

• Binary: 10010100101110010101000100010110010001100100000₂
• Hexadecimal: 0x4A5CA88B2320
• Base-36: SZCV3NQ5C

Squares and roots of 81761825137440

• 81761825137440 squared (81761825137440²) is 6684996049805315474889753600
• 81761825137440 cubed (81761825137440³) is 546577478068659345012970487005167734784000
• The square root of 81761825137440 is 9042224.5679611387
• The cube root of 81761825137440 is 43402.7112100427

Scales and comparisons

• 81,761,825,137,440 seconds is equal to 2,599,773 years, 6 weeks, 6 days, 13 hours, 44 minutes.
• To count from 1 to 81,761,825,137,440 would take you about six million, four hundred ninety-nine thousand, four hundred thirty-two 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 81761825137440 cubic inches would be around 3616.9 feet tall.

Recreational maths with 81761825137440

• 81761825137440 backwards is 04473152816718
• The number of decimal digits it has is: 14
• The sum of 81761825137440's digits is 57
• More coming soon!