81380700800

Names of 81380700800

• Cardinal: 81380700800 can be written as Eighty-one billion, three hundred eighty million, seven hundred thousand, eight hundred.

Scientific notation

• Scientific notation: 8.13807008 × 10¹⁰

Factors of 81380700800

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 859

Divisors of 81380700800

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 20 25 28 32 35 37 40 50 56 64 70 74 80 100 112 128 140 148 149 160 175 185 200 224 259 280 296 298 320 350 370 400 448 518 560 592 596 640 659 700 740 745 800 896 925 1036 1043 1120 1184 1192 1295 1318 1400 1480 1490 1600 1850 2072 2086 2240 2368 2384 2590 2636 2800 2960 2980 3200 3295 3700 3725 4144 4172 4480 4613 4736 4768 5180 5215 5272 5513 5600 5920 5960 6475 6590 7400 7450 8288 8344 9226 9536 10360 10430 10544 11026 11200 11840 11920 12950 13180 14800 14900 16475 16576 16688 18452 19072 20720 20860 21088 22052 22400 23065 23680 23840 24383 25900 26075 26360 27565 29600 29800 32950 33152 33376 36904 38591 41440 41720 42176 44104 46130 47680 48766 51800 52150 52720 55130 59200 59600 65900 66752 73808 77182 82880 83440 84352 88208 92260 95360 97532 98191 103600 104300 105440 110260 115325 118400 119200 121915 131800 133504 137825 147616 154364 165760 166880 170681 176416 184520 192955 195064 196382 207200 208600 210880 220520 230650 238400 243830 263600 275650 295232 308728 333760 341362 352832 369040 385910 390128 392764 414400 417200 421760 441040 461300 476800 487660 490955 527200 551300 590464 609575 617456 667520 682724 687337 705664 738080 771820 780256 785528 828800 834400 853405 882080 922600 964775 975320 981910 1054400 1102600 1219150 1234912 1365448 1374674 1476160 1543640 1560512 1571056 1668800 1706810 1764160 1845200 1929550 1950640 1963820 2108800 2205200 2438300 2454775 2469824 2730896 2749348 2952320 3087280 3121024 3142112 3337600 3413620 3436685 3528320 3633067 3690400 3859100 3901280 3927640 4267025 4410400 4876600 4909550 4939648 5461792 5498696 6174560 6284224 6827240 6873370 7266134 7380800 7718200 7802560 7855280 8534050 8820800 9753200 9819100 10923584 10997392 12349120 12568448 13654480 13746740 14532268 14761600 15436400 15605120 15710560 17068100 17183425 17641600 18165335 19506400 19638200 21847168 21994784 24698240 25431469 27308960 27493480 29064536 30872800 31421120 34136200 34366850 36330670 39012800 39276400 43989568 50862938 54617920 54986960 58129072 61745600 62842240 68272400 68733700 72661340 78025600 78552800 87979136 90826675 101725876 109235840 109973920 116258144 123491200 127157345 136544800 137467400 145322680 157105600 181653350 203451752 219947840 232516288 254314690 273089600 274934800 290645360 314211200 363306700 406903504 439895680 465032576 508629380 546179200 549869600 581290720 635786725 726613400 813807008 1017258760 1099739200 1162581440 1271573450 1453226800 1627614016 2034517520 2199478400 2325162880 2543146900 2906453600 3255228032 4069035040 5086293800 5812907200 8138070080 10172587600 11625814400 16276140160 20345175200 40690350400 81380700800
• Sum of all divisors σ(n): 237908880000
• Sum of proper divisors (its aliquot sum) s(n): 156528179200
• 81380700800 is an abundant number, because the sum of its proper divisors (156528179200) is greater than itself. Its abundance is 75147478400

Bases of 81380700800

• Binary: 1001011110010101010101111001010000000₂
• Hexadecimal: 0x12F2AAF280
• Base-36: 11DVYUM8

Squares and roots of 81380700800

• 81380700800 squared (81380700800²) is 6622818462699120640000
• 81380700800 cubed (81380700800³) is 538969607765633097226944512000000
• The square root of 81380700800 is 285273.0285182951
• The cube root of 81380700800 is 4333.5167059811

Scales and comparisons

• 81,380,700,800 seconds is equal to 2,587 years, 34 weeks, 6 hours, 13 minutes, 20 seconds.
• To count from 1 to 81,380,700,800 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 81380700800 cubic inches would be around 361.1 feet tall.

Recreational maths with 81380700800

• 81380700800 backwards is 00800708318
• 81380700800 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81380700800's digits is 35
• More coming soon!