81817852729680

Names of 81817852729680

• Cardinal: 81817852729680 can be written as Eighty-one trillion, eight hundred seventeen billion, eight hundred fifty-two million, seven hundred twenty-nine thousand, six hundred eighty.

Scientific notation

• Scientific notation: 8.181785272968 × 10¹³

Factors of 81817852729680

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 62713

Divisors of 81817852729680

• Number of divisors d(n): 400
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 27 30 36 40 45 48 54 60 67 72 80 81 90 108 120 134 135 144 162 180 201 216 240 268 270 324 335 360 402 405 432 536 540 603 648 670 720 804 810 1005 1072 1080 1206 1296 1340 1608 1620 1809 2010 2160 2412 2680 3015 3169 3216 3240 3618 4020 4824 5360 5427 6030 6338 6480 7236 8040 9045 9507 9648 10854 12060 12676 14472 15845 16080 18090 19014 21708 24120 25352 27135 28521 28944 31690 36180 38028 43416 47535 48240 50704 54270 57042 59467 63380 72360 76056 85563 86832 95070 108540 114084 118934 126760 142605 144720 152112 171126 178401 190140 212323 217080 228168 237868 253520 256689 285210 297335 342252 356802 380280 424646 427815 434160 456336 475736 513378 535203 570420 594670 636969 684504 713604 760560 849292 855630 892005 951472 1026756 1061615 1070406 1140840 1189340 1273938 1283445 1369008 1427208 1605609 1698584 1711260 1784010 1910907 2053512 2123230 2140812 2281680 2378680 2547876 2566890 2676015 2854416 3184845 3211218 3397168 3422520 3568020 3821814 3984289 4107024 4246460 4281624 4757360 4816827 5095752 5133780 5352030 5732721 6369690 6422436 6845040 7136040 7643628 7968578 8028045 8492920 8563248 9554535 9633654 10191504 10267560 10704060 11465442 11952867 12739380 12844872 14272080 15287256 15937156 16056090 16985840 17198163 19109070 19267308 19921445 20535120 21408120 22930884 23905734 24084135 25478760 25689744 28663605 30574512 31874312 32112180 34396326 35858601 38218140 38534616 39842890 42816240 45861768 47811468 48168270 50957520 57327210 59764335 63748624 64224360 68792652 71717202 76436280 77069232 79685780 85990815 91723536 95622936 96336540 107575803 114654420 119528670 128448720 137585304 143434404 152872560 159371560 171981630 179293005 188450923 191245872 192673080 215151606 229308840 239057340 275170608 286868808 318743120 322727409 343963260 358586010 376901846 385346160 430303212 458617680 478114680 537879015 565352769 573737616 645454818 687926520 717172020 753803692 860606424 942254615 956229360 1075758030 1130705538 1290909636 1375853040 1434344040 1507607384 1613637045 1696058307 1721212848 1884509230 2151516060 2261411076 2581819272 2826763845 2868688080 3015214768 3227274090 3392116614 3769018460 4303032120 4522822152 5088174921 5163638544 5653527690 6454548180 6784233228 7538036920 8480291535 8606064240 9045644304 10176349842 11307055380 12626211841 12909096360 13568466456 15076073840 15264524763 16960583070 20352699684 22614110760 25252423682 25440874605 25818192720 27136932912 30529049526 33921166140 37878635523 40705399368 45228221520 50504847364 50881749210 61058099052 63131059205 67842332280 75757271046 76322623815 81410798736 101009694728 101763498420 113635906569 122116198104 126262118410 135684664560 151514542092 152645247630 189393177615 202019389456 203526996840 227271813138 244232396208 252524236820 303029084184 305290495260 340907719707 378786355230 407053993680 454543626276 505048473640 568179532845 606058168368 610580990520 681815439414 757572710460 909087252552 1010096947280 1022723159121 1136359065690 1221161981040 1363630878828 1515145420920 1704538598535 1818174505104 2045446318242 2272718131380 2727261757656 3030290841840 3409077197070 4090892636484 4545436262760 5113615795605 5454523515312 6818154394140 8181785272968 9090872525520 10227231591210 13636308788280 16363570545936 20454463182420 27272617576560 40908926364840 81817852729680
• Sum of all divisors σ(n): 288502660332480
• Sum of proper divisors (its aliquot sum) s(n): 206684807602800
• 81817852729680 is an abundant number, because the sum of its proper divisors (206684807602800) is greater than itself. Its abundance is 124866954873120

Bases of 81817852729680

• Binary: 10010100110100110110100000011000101100101010000₂
• Hexadecimal: 0x4A69B40C5950
• Base-36: T02LP1H00

Squares and roots of 81817852729680

• 81817852729680 squared (81817852729680²) is 6694161025295605027152902400
• 81817852729680 cubed (81817852729680³) is 547701880916399485299749226146574623232000
• The square root of 81817852729680 is 9045322.1462632275
• The cube root of 81817852729680 is 43412.6229023595

Scales and comparisons

• 81,817,852,729,680 seconds is equal to 2,601,554 years, 33 weeks, 1 day, 1 hour, 48 minutes.
• To count from 1 to 81,817,852,729,680 would take you about six million, five hundred three thousand, eight hundred eighty-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 81817852729680 cubic inches would be around 3617.7 feet tall.

Recreational maths with 81817852729680

• 81817852729680 backwards is 08692725871818
• 81817852729680 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 81817852729680's digits is 72
• More coming soon!