81383902740

Names of 81383902740

• Cardinal: 81383902740 can be written as Eighty-one billion, three hundred eighty-three million, nine hundred two thousand, seven hundred forty.

Scientific notation

• Scientific notation: 8.138390274 × 10¹⁰

Factors of 81383902740

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 39295

Divisors of 81383902740

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 4 5 6 7 9 10 12 14 15 18 20 21 27 28 30 35 36 42 45 54 60 61 63 70 81 84 90 105 108 122 126 135 140 162 180 183 189 210 243 244 252 270 305 315 324 366 378 405 420 427 486 540 549 567 610 630 732 756 810 854 915 945 972 1098 1134 1215 1220 1260 1281 1620 1647 1701 1708 1830 1890 2135 2196 2268 2430 2562 2745 2835 3294 3402 3660 3780 3843 4270 4860 4941 5124 5490 5670 6405 6588 6804 7686 8235 8505 8540 9882 10980 11340 11529 12810 14823 15372 16470 17010 19215 19764 23058 24705 25620 29646 32940 34020 34587 38430 39217 46116 49410 57645 59292 69174 74115 76860 78434 98820 103761 115290 117651 138348 148230 156868 172935 196085 207522 230580 235302 274519 296460 345870 352953 392170 415044 470604 518805 549038 588255 691740 705906 784340 823557 1037610 1058859 1098076 1176510 1372595 1411812 1647114 1764765 2075220 2117718 2353020 2392237 2470671 2745190 3176577 3294228 3529530 4117785 4235436 4784474 4941342 5294295 5490380 6353154 7059060 7176711 7412013 8235570 9529731 9568948 9882684 10588590 11961185 12353355 12706308 14353422 14824026 15882885 16471140 16745659 19059462 21177180 21530133 22236039 23922370 24706710 28706844 29648052 31765770 33491318 35883555 37060065 38118924 43060266 44472078 47648655 47844740 49413420 50236977 63531540 64590399 66708117 66982636 71767110 74120130 83728295 86120532 88944156 95297310 100473954 107650665 111180195 129180798 133416234 143534220 148240260 150710931 167456590 190594620 193771197 200947908 215301330 222360390 251184885 258361596 266832468 301421862 322951995 333540585 334913180 387542394 430602660 444720780 452132793 502369770 581313591 602843724 645903990 667081170 753554655 775084788 904265586 968855985 1004739540 1162627182 1291807980 1334162340 1356398379 1507109310 1808531172 1937711970 2260663965 2325254364 2712796758 2906567955 3014218620 3875423940 4069195137 4521327930 5425593516 5813135910 6781991895 8138390274 9042655860 11626271820 13563983790 16276780548 20345975685 27127967580 40691951370 81383902740
• Sum of all divisors σ(n): 297384132864
• Sum of proper divisors (its aliquot sum) s(n): 216000230124
• 81383902740 is an abundant number, because the sum of its proper divisors (216000230124) is greater than itself. Its abundance is 134616327384

Bases of 81383902740

• Binary: 1001011110010110110111100111000010100₂
• Hexadecimal: 0x12F2DBCE14
• Base-36: 11DXVH90

Squares and roots of 81383902740

• 81383902740 squared (81383902740²) is 6623339625193779507600
• 81383902740 cubed (81383902740³) is 539033227870758605099523490824000
• The square root of 81383902740 is 285278.6405253643
• The cube root of 81383902740 is 4333.5735395971

Scales and comparisons

• 81,383,902,740 seconds is equal to 2,587 years, 39 weeks, 2 days, 7 hours, 39 minutes.
• To count from 1 to 81,383,902,740 would take you about five thousand, one hundred seventy-five 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 81383902740 cubic inches would be around 361.1 feet tall.

Recreational maths with 81383902740

• 81383902740 backwards is 04720938318
• 81383902740 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81383902740's digits is 45
• More coming soon!