81655442100

Names of 81655442100

• Cardinal: 81655442100 can be written as Eighty-one billion, six hundred fifty-five million, four hundred forty-two thousand, one hundred.

Scientific notation

• Scientific notation: 8.16554421 × 10¹⁰

Factors of 81655442100

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 2650

Divisors of 81655442100

• Number of divisors d(n): 432
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 15 17 18 20 25 29 30 34 36 45 50 51 58 60 68 73 75 85 87 90 100 102 116 145 146 150 153 170 174 180 204 219 225 255 261 290 292 300 306 340 348 365 425 435 438 450 493 510 522 580 612 657 725 730 765 850 870 876 900 986 1020 1044 1095 1241 1275 1305 1314 1450 1460 1479 1530 1700 1740 1825 1972 2117 2175 2190 2465 2482 2521 2550 2610 2628 2900 2958 3060 3285 3650 3723 3825 4234 4350 4380 4437 4930 4964 5042 5100 5220 5475 5916 6205 6351 6525 6570 7300 7395 7446 7563 7650 8468 8700 8874 9860 10084 10585 10950 11169 12325 12410 12605 12702 13050 13140 14790 14892 15126 15300 16425 17748 18615 19053 21170 21900 22185 22338 22689 24650 24820 25210 25404 26100 29580 30252 31025 31755 32850 35989 36975 37230 37815 38106 42340 42857 44370 44676 45378 49300 50420 52925 55845 62050 63025 63510 65700 71978 73109 73950 74460 75630 76212 85714 88740 90756 93075 95265 105850 107967 110925 111690 113445 124100 126050 127020 128571 143956 146218 147900 151260 158775 171428 179945 184033 186150 189075 190530 211700 214285 215934 219327 221850 223380 226890 252100 257142 279225 292436 317550 323901 359890 365545 368066 372300 378150 381060 385713 428570 431868 438654 443700 453780 476325 514284 539835 552099 558450 567225 635100 642855 647802 657981 719780 731090 736132 756300 771426 857140 877308 899725 920165 952650 1071425 1079670 1096635 1104198 1116900 1134450 1242853 1285710 1295604 1315962 1462180 1542852 1619505 1656297 1799450 1827725 1840330 1905300 1928565 2142850 2159340 2193270 2208396 2268900 2485706 2571420 2631924 2699175 2760495 3128561 3214275 3239010 3289905 3312594 3598900 3655450 3680660 3728559 3857130 4285700 4386540 4600825 4971412 5336957 5398350 5483175 5520990 6214265 6257122 6428550 6478020 6579810 6625188 7310900 7457118 7714260 8097525 8281485 9201650 9385683 9642825 10673914 10796700 10966350 11041980 11185677 12428530 12514244 12857100 13159620 13802475 14914236 15642805 16010871 16195050 16449525 16562970 18403300 18642795 18771366 19285650 21347828 21932700 22371354 24857060 26684785 27604950 28157049 31071325 31285610 32021742 32390100 32899050 33125940 37285590 37542732 38571300 41407425 44742708 46928415 48032613 53369570 55209900 55928385 56314098 62142650 62571220 64043484 65798100 74571180 78214025 80054355 82814850 90728269 93213975 93856830 96065226 106739140 111856770 112628196 124285300 133423925 140785245 156428050 160108710 165629700 181456538 186427950 187713660 192130452 223713540 234642075 240163065 266847850 272184807 279641925 281570490 312856100 320217420 362913076 372855900 400271775 453641345 469284150 480326130 533695700 544369614 559283850 563140980 703926225 800543550 816554421 907282690 938568300 960652260 1088739228 1118567700 1200815325 1360924035 1407852450 1601087100 1633108842 1814565380 2268206725 2401630650 2721848070 2815704900 3266217684 4082772105 4536413450 4803261300 5443696140 6804620175 8165544210 9072826900 13609240350 16331088420 20413860525 27218480700 40827721050 81655442100
• Sum of all divisors σ(n): 284297897520
• Sum of proper divisors (its aliquot sum) s(n): 202642455420
• 81655442100 is an abundant number, because the sum of its proper divisors (202642455420) is greater than itself. Its abundance is 120987013320

Bases of 81655442100

• Binary: 1001100000011000010110010101010110100₂
• Hexadecimal: 0x13030B2AB4
• Base-36: 11IFJID0

Squares and roots of 81655442100

• 81655442100 squared (81655442100²) is 6667611224546452410000
• 81655442100 cubed (81655442100³) is 544446742291262943525160461000000
• The square root of 81655442100 is 285754.1637491919
• The cube root of 81655442100 is 4338.3878801509

Scales and comparisons

• 81,655,442,100 seconds is equal to 2,596 years, 20 weeks, 2 days, 3 hours, 15 minutes.
• To count from 1 to 81,655,442,100 would take you about five thousand, one hundred ninety-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 81655442100 cubic inches would be around 361.5 feet tall.

Recreational maths with 81655442100

• 81655442100 backwards is 00124455618
• 81655442100 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81655442100's digits is 36
• More coming soon!