81639680644160136

Names of 81639680644160136

• Cardinal: 81639680644160136 can be written as Eighty-one quadrillion, six hundred thirty-nine trillion, six hundred eighty billion, six hundred forty-four million, one hundred sixty thousand, one hundred thirty-six.

Scientific notation

• Scientific notation: 8.1639680644160136 × 10¹⁶

Factors of 81639680644160136

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 7921

Divisors of 81639680644160136

• Number of divisors d(n): 432
• Complete list of divisors:
  1 2 3 4 6 8 9 12 18 24 36 41 72 82 123 149 164 246 298 328 369 447 492 596 738 809 894 984 1192 1341 1476 1618 1681 1788 2427 2682 2952 3236 3362 3576 4854 5043 5364 6109 6472 6724 6917 7281 9708 10086 10728 12218 13448 13834 14562 15129 18327 19416 20172 20751 24436 27668 29124 30258 33169 36654 40344 41502 48872 54981 55336 58248 60516 62253 66338 73308 83004 99507 109962 120541 121032 124506 132676 146616 166008 199014 219924 241082 249012 250469 265352 283597 298521 361623 398028 439848 482164 498024 500938 567194 597042 654481 723246 751407 796056 850791 964328 1001876 1030633 1084869 1134388 1194084 1308962 1359929 1446492 1502814 1701582 1963443 2003752 2061266 2169738 2254221 2268776 2388168 2552373 2617924 2719858 2892984 3005628 3091899 3403164 3926886 4079787 4122532 4339476 4508442 4942181 5104746 5235848 5439716 5595853 5890329 6011256 6183798 6806328 7853772 8159574 8245064 8678952 9016884 9275697 9884362 10209492 10879432 11191706 11627477 11780658 12239361 12367596 14826543 15707544 16319148 16787559 18033768 18551394 19768724 20418984 22383412 23254954 23561316 24478722 24735192 26833721 29653086 32638296 33575118 34882431 37102788 39537448 42255953 44479629 44766824 46509908 47122632 48957444 50362677 53667442 59306172 67150236 69764862 74205576 80501163 84511906 88959258 93019816 97517669 97914888 100725354 104647293 107334884 118612344 126767859 134300472 139529724 161002326 169023812 177918516 195035338 201450708 202629421 209294586 214669768 229429973 241503489 253535718 279059448 292553007 322004652 338047624 355837032 380303577 390070676 402901416 405258842 418589172 458859946 483006978 507071436 585106014 607888263 644009304 688289919 760607154 780141352 810517684 833782097 837178344 877659021 917719892 966013956 1014142872 1100182561 1170212028 1215776526 1376579838 1521214308 1621035368 1667564194 1732494073 1755318042 1823664789 1835439784 1932027912 2064869757 2200365122 2340424056 2431553052 2501346291 2753159676 3042428616 3300547683 3335128388 3464988146 3510636084 3647329578 3998224429 4129739514 4400730244 4527045077 4863106104 5002692582 5197482219 5506319352 6601095366 6670256776 6929976292 7021272168 7294659156 7504038873 7996448858 8259479028 8801460488 9054090154 9406628893 9901643049 10005385164 10394964438 11994673287 13202190732 13581135231 13859952584 14589318312 15008077746 15592446657 15992897716 16518958056 18108180308 18813257786 19803286098 20010770328 20789928876 23989346574 26404381464 27162270462 28219886679 30016155492 31184893314 31985795432 34185065977 35984019861 36216360616 37626515572 39606572196 40743405693 41579857752 47978693148 54324540924 56439773358 60032310984 62369786628 68370131954 71968039722 75253031144 79213144392 81486811386 84659660037 95957386296 102555197931 108649081848 112879546716 124739573256 136740263908 143936079444 162973622772 163927201589 169319320074 185608848157 205110395862 225759093432 273480527816 287872158888 307665593793 325947245544 327854403178 338638640148 371217696314 410220791724 491781604767 556826544471 615331187586 655708806356 674529716473 677277280296 742435392628 820441583448 983563209534 1113653088942 1230662375172 1311417612712 1349059432946 1401587705057 1475344814301 1484870785256 1670479633413 1967126419068 2023589149419 2227306177884 2461324750344 2698118865892 2803175410114 2950689628602 3340959266826 3934252838136 4047178298838 4204763115171 4454612355768 5396237731784 5606350820228 5901379257204 6070767448257 6681918533652 7609962774437 8094356597676 8409526230342 11212701640456 11802758514408 12141534896514 12614289345513 13363837067304 15219925548874 16188713195352 16819052460684 22829888323311 24283069793028 25228578691026 27655718375393 30439851097748 33638104921368 45659776646622 48566139586056 50457157382052 55311436750786 60879702195496 68489664969933 82967155126179 91319553293244 100914314764104 110622873501572 136979329939866 165934310252358 182639106586488 221245747003144 248901465378537 273958659879732 331868620504716 497802930757074 547917319759464 663737241009432 995605861514148 1133884453391113 1991211723028296 2267768906782226 3401653360173339 4535537813564452 6803306720346678 9071075627128904 10204960080520017 13606613440693356 20409920161040034 27213226881386712 40819840322080068 81639680644160136
• Sum of all divisors σ(n): 228468278223139500
• Sum of proper divisors (its aliquot sum) s(n): 146828597578979364
• 81639680644160136 is an abundant number, because the sum of its proper divisors (146828597578979364) is greater than itself. Its abundance is 65188916934819228

Bases of 81639680644160136

• Binary: 100100010000010101101101101100100010111110001101010001000₂
• Hexadecimal: 0x1220ADB645F1A88
• Base-36: MBUUNJ1FYQ0

Squares and roots of 81639680644160136

• 81639680644160136 squared (81639680644160136²) is 6665037455680455158535240811538496
• 81639680644160136 cubed (81639680644160136³) is 544131529363117975293382296040905403074667952595456
• The square root of 81639680644160136 is 285726583.7197514529
• The cube root of 81639680644160136 is 433810.8724602923

Scales and comparisons

• 81,639,680,644,160,136 seconds is equal to 2,595,889,316 years, 19 weeks, 2 days, 6 hours, 15 minutes, 36 seconds.
• To count from 1 to 81,639,680,644,160,136 would take you about seven billion, seven hundred eighty-seven million, six hundred sixty-seven thousand, nine hundred forty-nine 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 81639680644160136 cubic inches would be around 36150.9 feet tall.

Recreational maths with 81639680644160136

• 81639680644160136 backwards is 63106144608693618
• 81639680644160136 is a Harshad number.
• The number of decimal digits it has is: 17
• The sum of 81639680644160136's digits is 72
• More coming soon!