81997973200

Names of 81997973200

• Cardinal: 81997973200 can be written as Eighty-one billion, nine hundred ninety-seven million, nine hundred seventy-three thousand, two hundred.

Scientific notation

• Scientific notation: 8.19979732 × 10¹⁰

Factors of 81997973200

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 50

Divisors of 81997973200

• Number of divisors d(n): 450
• Complete list of divisors:
  1 2 4 5 8 10 11 13 16 19 20 22 25 26 38 40 44 50 52 55 65 76 80 88 95 100 104 110 121 130 143 152 176 190 200 208 209 220 242 247 260 275 286 304 325 361 380 400 418 440 475 484 494 520 550 572 605 650 715 722 760 836 880 950 968 988 1040 1045 1100 1144 1210 1235 1300 1430 1444 1520 1573 1672 1805 1900 1936 1976 2090 2200 2288 2299 2420 2470 2600 2717 2860 2888 3025 3146 3344 3575 3610 3800 3952 3971 4180 4400 4598 4693 4840 4940 5200 5225 5434 5720 5776 6050 6175 6292 6859 7150 7220 7600 7865 7942 8360 9025 9196 9386 9680 9880 10450 10868 11440 11495 12100 12350 12584 13585 13718 14300 14440 15730 15884 16720 18050 18392 18772 19760 19855 20900 21736 22990 23465 24200 24700 25168 27170 27436 28600 28880 29887 31460 31768 34295 36100 36784 37544 39325 39710 41800 43472 43681 45980 46930 48400 49400 51623 54340 54872 57200 57475 59774 62920 63536 67925 68590 72200 75088 75449 78650 79420 83600 87362 89167 91960 93860 98800 99275 103246 108680 109744 114950 117325 119548 125840 130321 135850 137180 144400 149435 150898 157300 158840 171475 174724 178334 183920 187720 198550 206492 217360 218405 229900 234650 239096 258115 260642 271700 274360 298870 301796 314600 317680 342950 349448 356668 375440 377245 397100 412984 436810 445835 459800 469300 478192 516230 521284 543400 548720 567853 597740 603592 629200 651605 685900 698896 713336 747175 754490 794200 825968 829939 873620 891670 919600 938600 980837 1032460 1042568 1086800 1092025 1135706 1195480 1207184 1290575 1303210 1371800 1426672 1433531 1494350 1508980 1588400 1659878 1694173 1747240 1783340 1877200 1886225 1961674 2064920 2085136 2184050 2229175 2271412 2390960 2581150 2606420 2743600 2839265 2867062 2988700 3017960 3258025 3319756 3388346 3494480 3566680 3772450 3923348 4129840 4149695 4368100 4458350 4542824 4904185 5162300 5212840 5678530 5734124 5977400 6035920 6516050 6639512 6776692 7133360 7167655 7544900 7846696 8299390 8470865 8736200 8916700 9085648 9808370 10324600 10425680 10789207 11357060 11468248 11954800 13032100 13279024 13553384 14196325 14335310 15089800 15693392 15768841 16598780 16941730 17472400 17833400 18635903 19616740 20649200 20748475 21578414 22714120 22936496 24520925 26064200 27106768 28392650 28670620 30179600 31537682 33197560 33883460 35666800 35838275 37271806 39233480 41496950 42354325 43156828 45428240 49041850 52128400 53946035 56785300 57341240 63075364 66395120 67766920 71676550 74543612 78466960 78844205 82993900 84708650 86313656 93179515 98083700 107892070 113570600 114682480 126150728 135533840 143353100 149087224 157688410 165987800 169417300 172627312 186359030 196167400 204994933 215784140 227141200 252301456 269730175 286706200 298174448 315376820 331975600 338834600 372718060 392334800 394221025 409989866 431568280 465897575 539460350 573412400 630753640 677669200 745436120 788442050 819979732 863136560 931795150 1024974665 1078920700 1261507280 1490872240 1576884100 1639959464 1863590300 2049949330 2157841400 3153768200 3279918928 3727180600 4099898660 4315682800 5124873325 6307536400 7454361200 8199797320 10249746650 16399594640 20499493300 40998986600 81997973200
• Sum of all divisors σ(n): 246149177302
• Sum of proper divisors (its aliquot sum) s(n): 164151204102
• 81997973200 is an abundant number, because the sum of its proper divisors (164151204102) is greater than itself. Its abundance is 82153230902

Bases of 81997973200

• Binary: 1001100010111011101011100011011010000₂
• Hexadecimal: 0x131775C6D0
• Base-36: 11O3H51S

Squares and roots of 81997973200

• 81997973200 squared (81997973200²) is 6723667608907918240000
• 81997973200 cubed (81997973200³) is 551327116400939561111311168000000
• The square root of 81997973200 is 286352.8822973501
• The cube root of 81997973200 is 4344.4456911847

Scales and comparisons

• 81,997,973,200 seconds is equal to 2,607 years, 14 weeks, 4 days, 14 hours, 46 minutes, 40 seconds.
• To count from 1 to 81,997,973,200 would take you about five thousand, two hundred fourteen 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 81997973200 cubic inches would be around 362 feet tall.

Recreational maths with 81997973200

• 81997973200 backwards is 00237979918
• 81997973200 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81997973200's digits is 55
• More coming soon!