81642722040

Names of 81642722040

• Cardinal: 81642722040 can be written as Eighty-one billion, six hundred forty-two million, seven hundred twenty-two thousand and forty.

Scientific notation

• Scientific notation: 8.164272204 × 10¹⁰

Factors of 81642722040

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 878

Divisors of 81642722040

• Number of divisors d(n): 480
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 11 12 15 18 20 22 24 27 30 33 36 40 44 45 54 55 60 66 72 81 88 90 99 108 110 120 121 132 135 162 165 180 198 216 220 242 243 264 270 297 324 330 360 363 396 405 440 484 486 495 540 594 605 648 660 726 729 792 810 857 891 968 972 990 1080 1089 1188 1210 1215 1320 1452 1458 1485 1620 1714 1782 1815 1944 1980 2178 2187 2376 2420 2430 2571 2673 2904 2916 2970 3240 3267 3428 3564 3630 3645 3960 4285 4356 4374 4455 4840 4860 5142 5346 5445 5832 5940 6534 6561 6856 7128 7260 7290 7713 8019 8570 8712 8748 8910 9427 9720 9801 10284 10692 10890 10935 11880 12855 13068 13122 13365 14520 14580 15426 16038 16335 17140 17496 17820 18854 19602 19683 20568 21384 21780 21870 23139 24057 25710 26136 26244 26730 28281 29160 29403 30852 32076 32670 32805 34280 35640 37708 38565 39204 39366 40095 43560 43740 46278 47135 48114 49005 51420 52488 53460 56562 58806 61704 64152 65340 65610 69417 72171 75416 77130 78408 78732 80190 84843 87480 88209 92556 94270 96228 98010 98415 102840 103697 106920 113124 115695 117612 120285 130680 131220 138834 141405 144342 147015 154260 157464 160380 169686 176418 185112 188540 192456 196020 196830 207394 208251 216513 226248 231390 235224 240570 254529 262440 264627 277668 282810 288684 294030 308520 311091 320760 339372 347085 352836 360855 377080 392040 393660 414788 416502 424215 433026 441045 462780 481140 509058 518485 529254 555336 565620 577368 588060 622182 624753 678744 694170 705672 721710 763587 787320 793881 829576 833004 848430 866052 882090 925560 933273 962280 1018116 1036970 1041255 1058508 1082565 1131240 1176120 1244364 1249506 1272645 1323135 1388340 1443420 1527174 1555455 1587762 1666008 1696860 1732104 1764180 1866546 1874259 2036232 2073940 2082510 2117016 2165130 2290761 2381643 2488728 2499012 2545290 2646270 2776680 2799819 2886840 3054348 3110910 3123765 3175524 3393720 3528360 3733092 3748518 3817935 3969405 4147880 4165020 4330260 4581522 4666365 4763286 4998024 5090580 5292540 5599638 5622777 6108696 6221820 6247530 6351048 6872283 7466184 7497036 7635870 7938810 8330040 8399457 8660520 9163044 9332730 9371295 9526572 10181160 10585080 11199276 11245554 11453805 11908215 12443640 12495060 13744566 13999095 14994072 15271740 15877620 16798914 16868331 18326088 18665460 18742590 19053144 20616849 22398552 22491108 22907610 23816430 24990120 25198371 27489132 27998190 28113885 30543480 31755240 33597828 33736662 34361415 37330920 37485180 41233698 41997285 44982216 45815220 47632860 50396742 54978264 55996380 56227770 61850547 67195656 67473324 68722830 74970360 75595113 82467396 83994570 84341655 91630440 95265720 100793484 103084245 111992760 112455540 123701094 125991855 134946648 137445660 151190226 164934792 167989140 168683310 185551641 201586968 206168490 224911080 226785339 247402188 251983710 274891320 302380452 309252735 335978280 337366620 371103282 377975565 412336980 453570678 494804376 503967420 604760904 618505470 674733240 680356017 742206564 755951130 824673960 907141356 927758205 1007934840 1133926695 1237010940 1360712034 1484413128 1511902260 1814282712 1855516410 2041068051 2267853390 2474021880 2721424068 3023804520 3401780085 3711032820 4082136102 4535706780 5442848136 6803560170 7422065640 8164272204 9071413560 10205340255 13607120340 16328544408 20410680510 27214240680 40821361020 81642722040
• Sum of all divisors σ(n): 303219156240
• Sum of proper divisors (its aliquot sum) s(n): 221576434200
• 81642722040 is an abundant number, because the sum of its proper divisors (221576434200) is greater than itself. Its abundance is 139933712160

Bases of 81642722040

• Binary: 1001100000010010010010001001011111000₂
• Hexadecimal: 0x13024912F8
• Base-36: 11I7YVI0

Squares and roots of 81642722040

• 81642722040 squared (81642722040²) is 6665534062100701761600
• 81642722040 cubed (81642722040³) is 544192344680239692411247145664000
• The square root of 81642722040 is 285731.9058838197
• The cube root of 81642722040 is 4338.1625944119

Scales and comparisons

• 81,642,722,040 seconds is equal to 2,595 years, 51 weeks, 1 day, 21 hours, 54 minutes.
• To count from 1 to 81,642,722,040 would take you about five thousand, one hundred ninety-one 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 81642722040 cubic inches would be around 361.5 feet tall.

Recreational maths with 81642722040

• 81642722040 backwards is 04022724618
• 81642722040 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81642722040's digits is 36
• More coming soon!