81103612800

Names of 81103612800

• Cardinal: 81103612800 can be written as Eighty-one billion, one hundred three million, six hundred twelve thousand, eight hundred.

Scientific notation

• Scientific notation: 8.11036128 × 10¹⁰

Factors of 81103612800

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 63557

Divisors of 81103612800

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 12 14 15 16 19 20 21 24 25 28 30 32 35 38 40 42 48 50 56 57 60 64 70 75 76 80 84 95 96 100 105 112 114 120 128 133 140 150 152 160 168 175 190 192 200 210 224 228 240 266 280 285 300 304 320 336 350 380 384 399 400 420 448 456 475 480 525 532 560 570 600 608 640 665 672 700 760 798 800 840 896 912 950 960 1050 1064 1120 1140 1200 1216 1330 1344 1400 1425 1520 1596 1600 1680 1824 1900 1920 1995 2100 2128 2240 2280 2400 2432 2660 2688 2800 2850 3040 3192 3200 3325 3360 3648 3800 3990 4200 4256 4480 4560 4800 5320 5600 5700 6080 6384 6650 6720 7296 7600 7980 8400 8512 9120 9600 9975 10640 11200 11400 12160 12768 13300 13440 15200 15960 16800 17024 18240 19950 21280 22400 22800 25536 26600 30400 31920 33600 36480 39900 42560 45600 51072 53200 60800 63521 63840 67200 79800 85120 91200 106400 127042 127680 159600 182400 190563 212800 254084 255360 317605 319200 381126 425600 444647 508168 635210 638400 762252 889294 952815 1016336 1206899 1270420 1276800 1333941 1524504 1588025 1778588 1905630 2032672 2223235 2413798 2540840 2667882 3049008 3176050 3557176 3620697 3811260 4065344 4446470 4764075 4827596 5081680 5335764 6034495 6098016 6352100 6669705 7114352 7241394 7622520 8130688 8448293 8892940 9528150 9655192 10163360 10671528 11116175 12068990 12196032 12704200 13339410 14228704 14482788 15245040 16896586 17785880 18103485 19056300 19310384 20326720 21343056 22232350 24137980 24392064 25344879 25408400 26678820 28457408 28965576 30172475 30490080 33348525 33793172 35571760 36206970 38112600 38620768 40653440 42241465 42686112 44464700 48275960 50689758 50816800 53357640 56914816 57931152 60344950 60980160 66697050 67586344 71143520 72413940 76225200 77241536 84482930 85372224 88929400 90517425 96551920 101379516 101633600 106715280 115862304 120689900 121960320 126724395 133394100 135172688 142287040 144827880 152450400 154483072 168965860 170744448 177858800 181034850 193103840 202759032 203267200 211207325 213430560 231724608 241379800 253448790 266788200 270345376 284574080 289655760 304900800 337931720 355717600 362069700 386207680 405518064 422414650 426861120 463449216 482759600 506897580 533576400 540690752 579311520 609801600 633621975 675863440 711435200 724139400 772415360 811036128 844829300 853722240 965519200 1013795160 1067152800 1081381504 1158623040 1267243950 1351726880 1422870400 1448278800 1622072256 1689658600 1931038400 2027590320 2134305600 2317246080 2534487900 2703453760 2896557600 3244144512 3379317200 3862076800 4055180640 4268611200 5068975800 5406907520 5793115200 6758634400 8110361280 10137951600 11586230400 13517268800 16220722560 20275903200 27034537600 40551806400 81103612800
• Sum of all divisors σ(n): 321370502400
• Sum of proper divisors (its aliquot sum) s(n): 240266889600
• 81103612800 is an abundant number, because the sum of its proper divisors (240266889600) is greater than itself. Its abundance is 159163276800

Bases of 81103612800

• Binary: 1001011100010001001101110101110000000₂
• Hexadecimal: 0x12E226EB80
• Base-36: 119AZW5C

Squares and roots of 81103612800

• 81103612800 squared (81103612800²) is 6577796009212323840000
• 81103612800 cubed (81103612800³) is 533483020608541545707569152000000
• The square root of 81103612800 is 284786.9603756465
• The cube root of 81103612800 is 4328.5928077579

Scales and comparisons

• 81,103,612,800 seconds is equal to 2,578 years, 43 weeks, 6 days, 5 hours, 20 minutes.
• To count from 1 to 81,103,612,800 would take you about five thousand, one hundred fifty-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 81103612800 cubic inches would be around 360.7 feet tall.

Recreational maths with 81103612800

• 81103612800 backwards is 00821630118
• 81103612800 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81103612800's digits is 30
• More coming soon!