81742255920

Names of 81742255920

• Cardinal: 81742255920 can be written as Eighty-one billion, seven hundred forty-two million, two hundred fifty-five thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 8.174225592 × 10¹⁰

Factors of 81742255920

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 2802

Divisors of 81742255920

• Number of divisors d(n): 640
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 13 15 16 18 20 24 26 27 29 30 36 37 39 40 45 48 52 54 58 60 65 72 74 78 80 87 90 104 108 111 116 117 120 130 135 144 145 148 156 174 180 185 195 208 216 222 232 234 240 260 261 270 290 296 312 333 348 351 360 370 377 390 432 435 444 464 468 481 520 522 540 555 580 585 592 624 666 696 702 720 740 754 780 783 870 888 936 962 999 1040 1044 1073 1080 1110 1131 1160 1170 1305 1332 1392 1404 1443 1480 1508 1560 1566 1665 1740 1755 1776 1872 1885 1924 1998 2088 2146 2160 2220 2262 2320 2340 2405 2610 2664 2713 2808 2886 2960 3016 3120 3132 3219 3330 3393 3480 3510 3770 3848 3915 3996 4176 4292 4329 4440 4524 4680 4810 4995 5220 5328 5365 5426 5616 5655 5772 6032 6264 6438 6660 6786 6960 7020 7215 7540 7696 7830 7992 8139 8584 8658 8880 9048 9360 9620 9657 9990 10179 10440 10730 10852 11310 11544 12528 12876 12987 13320 13565 13572 13949 14040 14430 15080 15660 15984 16095 16278 16965 17168 17316 18096 19240 19314 19980 20358 20880 21460 21645 21704 22620 23088 24417 25752 25974 26640 27130 27144 27898 28080 28860 28971 30160 31320 32190 32556 33930 34632 35269 38480 38628 39960 40695 40716 41847 42920 43290 43408 45240 48285 48834 50895 51504 51948 54260 54288 55796 57720 57942 62640 64380 64935 65112 67860 69264 69745 70538 73251 77256 78677 79920 81390 81432 83694 85840 86580 90480 96570 97668 100381 101790 103896 105807 108520 111592 115440 115884 122085 125541 128760 129870 130224 135720 139490 141076 144855 146502 154512 157354 162780 162864 167388 173160 176345 193140 195336 200762 203580 207792 209235 211614 217040 223184 231768 236031 244170 251082 257520 259740 271440 278980 282152 289710 293004 301143 314708 317421 325560 334776 346320 352690 366255 376623 386280 390672 393385 401524 407160 418470 423228 463536 472062 488340 501905 502164 519480 529035 557960 564304 579420 586008 602286 627705 629416 634842 651120 669552 705380 708093 732510 753246 772560 786770 803048 814320 836940 846456 903429 944124 952263 976680 1003810 1004328 1022801 1038960 1058070 1115920 1158840 1172016 1180155 1204572 1255410 1258832 1269684 1304953 1410760 1416186 1465020 1505715 1506492 1573540 1587105 1606096 1673880 1692912 1806858 1883115 1888248 1904526 1953360 2007620 2008656 2045602 2116140 2124279 2317680 2360310 2409144 2510820 2539368 2609906 2710287 2821520 2832372 2911049 2930040 3011430 3012984 3068403 3147080 3174210 3347760 3540465 3613716 3766230 3776496 3809052 3914859 4015240 4091204 4232280 4248558 4517145 4720620 4761315 4818288 5021640 5078736 5114005 5219812 5420574 5664744 5822098 5860080 6022860 6025968 6136806 6294160 6348420 6524765 7080930 7227432 7532460 7618104 7829718 8030480 8182408 8464560 8497116 8733147 9034290 9205209 9441240 9522630 10043280 10228010 10439624 10621395 10841148 11329488 11644196 11744577 12045720 12273612 12696840 13049530 13551435 14161860 14454864 14555245 15064920 15236208 15342015 15659436 16364816 16994232 17466294 18068580 18410418 18882480 19045260 19574295 20456020 20879248 21242790 21682296 23288392 23489154 24091440 24547224 25393680 26099060 26199441 27102870 27615627 28323720 29110490 30129840 30684030 31318872 33988464 34932588 35233731 36137160 36820836 37843637 38090520 39148590 40912040 42485580 43364592 43665735 46026045 46576784 46978308 49094448 52198120 52398882 54205740 55231254 56647440 58220980 58722885 61368060 62637744 69865176 70467462 72274320 73641672 75687274 76181040 78297180 78598323 81824080 84971160 87331470 92052090 93956616 104396240 104797764 108411480 110462508 113530911 116441960 117445770 122736120 130997205 138078135 139730352 140934924 147283344 151374548 156594360 157196646 169942320 174662940 176168655 184104180 187913232 189218185 209595528 216822960 220925016 227061822 232883920 234891540 245472240 261994410 276156270 281869848 302749096 313188720 314393292 340592733 349325880 352337310 368208360 378436370 392991615 419191056 441850032 454123644 469783080 523988820 552312540 563739696 567654555 605498192 628786584 681185466 698651760 704674620 736416720 756872740 785983230 908247288 939566160 1021778199 1047977640 1104625080 1135309110 1257573168 1362370932 1409349240 1513745480 1571966460 1702963665 1816494576 2043556398 2095955280 2209250160 2270618220 2724741864 2818698480 3027490960 3143932920 3405927330 4087112796 4541236440 5108890995 5449483728 6287865840 6811854660 8174225592 9082472880 10217781990 13623709320 16348451184 20435563980 27247418640 40871127960 81742255920
• Sum of all divisors σ(n): 322266873600
• Sum of proper divisors (its aliquot sum) s(n): 240524617680
• 81742255920 is an abundant number, because the sum of its proper divisors (240524617680) is greater than itself. Its abundance is 158782361760

Bases of 81742255920

• Binary: 1001100001000001101111101011100110000₂
• Hexadecimal: 0x130837D730
• Base-36: 11JV88C0

Squares and roots of 81742255920

• 81742255920 squared (81742255920²) is 6681796402890775046400
• 81742255920 cubed (81742255920³) is 546185111570433161649978674688000
• The square root of 81742255920 is 285906.0263792983
• The cube root of 81742255920 is 4339.9248204891

Scales and comparisons

• 81,742,255,920 seconds is equal to 2,599 years, 7 weeks, 5 days, 22 hours, 12 minutes.
• To count from 1 to 81,742,255,920 would take you about five thousand, one hundred ninety-eight 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 81742255920 cubic inches would be around 361.7 feet tall.

Recreational maths with 81742255920

• 81742255920 backwards is 02955224718
• 81742255920 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81742255920's digits is 45
• More coming soon!