81977507609920

Names of 81977507609920

• Cardinal: 81977507609920 can be written as Eighty-one trillion, nine hundred seventy-seven billion, five hundred seven million, six hundred nine thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 8.197750760992 × 10¹³

Factors of 81977507609920

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 131344

Divisors of 81977507609920

• Number of divisors d(n): 448
• Complete list of divisors:
  1 2 4 5 8 10 13 16 19 20 26 32 38 40 41 52 64 65 76 80 82 95 104 130 152 160 164 190 193 205 208 247 260 304 320 328 380 386 410 416 494 520 533 608 656 760 772 779 820 832 965 988 1040 1066 1216 1235 1312 1520 1544 1558 1640 1930 1976 2080 2132 2470 2509 2624 2665 3040 3088 3116 3280 3667 3860 3895 3952 4160 4264 4940 5018 5330 6080 6176 6232 6560 7334 7720 7790 7904 7913 8528 9880 10036 10127 10660 12352 12464 12545 13120 14668 15440 15580 15808 15826 17056 18335 19760 20072 20254 21320 24928 25090 29336 30880 31160 31652 34112 36670 39520 39565 40144 40508 42640 47671 49856 50180 50635 58672 61760 62320 63304 73340 79040 79130 80288 81016 85280 95342 100360 101270 102869 117344 124640 126608 131071 146680 150347 158260 160576 162032 170560 190684 200720 202540 205738 234688 238355 249280 253216 262142 293360 300694 316520 324064 381368 401440 405080 411476 476710 506432 514345 524284 586720 601388 633040 648128 655355 751735 762736 802880 810160 822952 953420 1028690 1048568 1173440 1202776 1266080 1310710 1503470 1525472 1620320 1645904 1703923 1906840 1954511 2057380 2097136 2405552 2490349 2532160 2621420 3006940 3050944 3240640 3291808 3407846 3813680 3909022 4114760 4194272 4811104 4980698 5242840 5373911 6013880 6583616 6815692 7627360 7818044 8229520 8388544 8519615 9622208 9772555 9961396 10485680 10747822 12027760 12451745 13631384 15254720 15636088 16459040 17039230 19545110 19922792 20971360 21495644 24055520 24903490 25296703 26869555 27262768 31272176 32374537 32918080 34078460 39090220 39845584 41942720 42991288 48111040 49806980 50593406 53739110 54525536 62544352 64749074 68156920 69860843 78180440 79691168 85982576 99613960 101186812 102104309 107478220 109051072 125088704 126483515 129498148 136313840 139721686 156360880 159382336 161872685 171965152 199227920 202373624 204208618 214956440 252967030 258996296 272627680 279443372 312721760 323745370 328857139 343930304 349304215 398455840 404747248 408417236 429912880 480637357 505934060 510521545 517992592 545255360 558886744 625443520 647490740 657714278 698608430 796911680 809494496 816834472 859825760 961274714 1011868120 1021043090 1035985184 1037164823 1117773488 1294981480 1315428556 1327356017 1397216860 1618988992 1633668944 1644285695 1719651520 1922549428 2023736240 2042086180 2071970368 2074329646 2235546976 2403186785 2589962960 2630857112 2654712034 2794433720 3267337888 3288571390 3845098856 4047472480 4084172360 4148659292 4471093952 4806373570 5179925920 5185824115 5261714224 5309424068 5588867440 6248285641 6534675776 6577142780 6636780085 7690197712 8094944960 8168344720 8297318584 9612747140 10359851840 10371648230 10523428448 10618848136 11177734880 12496571282 13154285560 13273560170 13483142699 15380395424 16336689440 16594637168 19225494280 19706131637 20743296460 21046856896 21237696272 22355469760 24993142564 26308571120 26547120340 26966285398 30760790848 31241428205 32673378880 33189274336 38450988560 39412263274 41486592920 42475392544 49986285128 52617142240 53094240680 53932570796 62482856410 66378548672 67415713495 76901977120 78824526548 82973185840 84950785088 98530658185 99972570256 105234284480 106188481360 107865141592 124965712820 134831426990 153803954240 157649053096 165946371680 197061316370 199945140512 212376962720 215730283184 249931425640 256179711281 269662853980 315298106192 331892743360 394122632740 399890281024 424753925440 431460566368 499862851280 512359422562 539325707960 630596212384 788245265480 862921132736 999725702560 1024718845124 1078651415920 1261192424768 1280898556405 1576490530960 1999451405120 2049437690248 2157302831840 2561797112810 3152981061920 4098875380496 4314605663680 5123594225620 6305962123840 8197750760992 10247188451240 16395501521984 20494376902480 40988753804960 81977507609920
• Sum of all divisors σ(n): 227863072604160
• Sum of proper divisors (its aliquot sum) s(n): 145885564994240
• 81977507609920 is an abundant number, because the sum of its proper divisors (145885564994240) is greater than itself. Its abundance is 63908057384320

Bases of 81977507609920

• Binary: 10010101000111011100000001110000111110101000000₂
• Hexadecimal: 0x4A8EE0387D40
• Base-36: T23Y3FN0G

Squares and roots of 81977507609920

• 81977507609920 squared (81977507609920²) is 6720311753934491510882406400
• 81977507609920 cubed (81977507609920³) is 550914407949199600334528109150242111488000
• The square root of 81977507609920 is 9054143.1184800697
• The cube root of 81977507609920 is 43440.8422272711

Scales and comparisons

• 81,977,507,609,920 seconds is equal to 2,606,631 years, 8 weeks, 5 days, 11 hours, 38 minutes, 40 seconds.
• To count from 1 to 81,977,507,609,920 would take you about six million, five hundred sixteen thousand, five hundred seventy-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 81977507609920 cubic inches would be around 3620.1 feet tall.

Recreational maths with 81977507609920

• 81977507609920 backwards is 02990670577918
• The number of decimal digits it has is: 14
• The sum of 81977507609920's digits is 70
• More coming soon!