81238680432

Names of 81238680432

• Cardinal: 81238680432 can be written as Eighty-one billion, two hundred thirty-eight million, six hundred eighty thousand, four hundred thirty-two.

Scientific notation

• Scientific notation: 8.1238680432 × 10¹⁰

Factors of 81238680432

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 23807

Divisors of 81238680432

• Number of divisors d(n): 400
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 13 14 16 18 21 24 26 27 28 29 36 39 42 48 52 54 56 58 63 72 78 81 84 87 91 104 108 112 116 117 126 144 156 162 168 174 182 189 203 208 216 232 234 252 261 273 312 324 336 348 351 364 377 378 406 432 464 468 504 522 546 567 609 624 648 696 702 728 754 756 783 812 819 936 1008 1044 1053 1092 1131 1134 1218 1296 1392 1404 1456 1508 1512 1566 1624 1638 1827 1872 2088 2106 2184 2262 2268 2349 2436 2457 2639 2808 3016 3024 3132 3248 3276 3393 3654 4176 4212 4368 4524 4536 4698 4872 4914 5278 5481 5616 6032 6264 6552 6786 7308 7371 7917 8424 9048 9072 9396 9744 9828 10179 10556 10962 12528 13104 13572 14616 14742 15834 16443 16848 18096 18792 19656 20358 21112 21924 23751 23753 27144 29232 29484 30537 31668 32886 37584 39312 40716 42224 43848 47502 47506 54288 58968 61074 63336 65772 71253 71259 81432 87696 95004 95012 117936 122148 126672 131544 142506 142518 162864 166271 190008 190024 213759 213777 244296 263088 285012 285036 308789 332542 380016 380048 427518 427554 488592 498813 570024 570072 617578 641331 665084 688837 855036 855108 926367 997626 1140048 1140144 1235156 1282662 1330168 1377674 1496439 1710072 1710216 1852734 1923993 1995252 2066511 2161523 2470312 2565324 2660336 2755348 2779101 2992878 3420144 3420432 3705468 3847986 3990504 4133022 4323046 4489317 4821859 4940624 5130648 5510696 5558202 5985756 6199533 6484569 7410936 7695972 7981008 8266044 8337303 8646092 8954881 8978634 9643718 10261296 11021392 11116404 11971512 12399066 12969138 13467951 14465577 14821872 15391944 16532088 16674606 17292184 17909762 17957268 18598599 19287436 19453707 22232808 23943024 24798132 25011909 25938276 26864643 26935902 28931154 30783888 33064176 33349212 34584368 35819524 35914536 37197198 38574872 38907414 43396731 44465616 49596264 50023818 51876552 53729286 53871804 55795797 57862308 58361121 62684167 66698424 71639048 71829072 74394396 77149744 77814828 80593929 86793462 99192528 100047636 103753104 107458572 107743608 111591594 115724616 116722242 125368334 130190193 133396848 143278096 148788792 155629656 161187858 173586924 175083363 188052501 200095272 214917144 215487216 223183188 231449232 233444484 241781787 250736668 260380386 297577584 311259312 322375716 347173848 350166726 376105002 390570579 400190544 429834288 446366376 466888968 483563574 501473336 520760772 564157503 644751432 694347696 700333452 725345361 752210004 781141158 892732752 933777936 967127148 1002946672 1041521544 1128315006 1289502864 1400666904 1450690722 1504420008 1562282316 1692472509 1934254296 2083043088 2256630012 2801333808 2901381444 3008840016 3124564632 3384945018 3868508592 4513260024 5077417527 5802762888 6249129264 6769890036 9026520048 10154835054 11605525776 13539780072 20309670108 27079560144 40619340216 81238680432
• Sum of all divisors σ(n): 299380213440
• Sum of proper divisors (its aliquot sum) s(n): 218141533008
• 81238680432 is an abundant number, because the sum of its proper divisors (218141533008) is greater than itself. Its abundance is 136902852576

Bases of 81238680432

• Binary: 1001011101010001100111110001101110000₂
• Hexadecimal: 0x12EA33E370
• Base-36: 11BJEV00

Squares and roots of 81238680432

• 81238680432 squared (81238680432²) is 6599723198332619706624
• 81238680432 cubed (81238680432³) is 536152803849000647587812729581568
• The square root of 81238680432 is 285023.9997473897
• The cube root of 81238680432 is 4330.9943798769

Scales and comparisons

• 81,238,680,432 seconds is equal to 2,583 years, 7 weeks, 1 day, 12 hours, 7 minutes, 12 seconds.
• To count from 1 to 81,238,680,432 would take you about five thousand, one hundred sixty-six 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 81238680432 cubic inches would be around 360.9 feet tall.

Recreational maths with 81238680432

• 81238680432 backwards is 23408683218
• The number of decimal digits it has is: 11
• The sum of 81238680432's digits is 45
• More coming soon!