81388493829378

Names of 81388493829378

• Cardinal: 81388493829378 can be written as Eighty-one trillion, three hundred eighty-eight billion, four hundred ninety-three million, eight hundred twenty-nine thousand, three hundred seventy-eight.

Scientific notation

• Scientific notation: 8.1388493829378 × 10¹³

Factors of 81388493829378

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 92829

Divisors of 81388493829378

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 6 9 18 101 131 202 262 303 393 606 786 909 1179 1818 2358 3851 7702 11553 13231 23106 26462 34659 39693 69318 79386 88741 119079 177482 238158 266223 388951 504481 532446 777902 798669 1008962 1166853 1513443 1597338 2333706 3026886 3500559 4540329 7001118 8962841 9080658 11625071 17925682 23250142 26888523 34875213 50952581 53777046 69750426 80665569 101905162 104625639 152857743 161331138 209251278 305715486 341741591 458573229 683483182 917146458 1025224773 1174132171 2050449546 2348264342 3075674319 3522396513 6151348638 7044793026 10567189539 21134379078 34515900691 44768148421 69031801382 89536296842 103547702073 134304445263 207095404146 268608890526 310643106219 402913335789 621286212438 805826671578 4521582990521 9043165981042 13564748971563 27129497943126 40694246914689 81388493829378
• Sum of all divisors σ(n): 179495762681664
• Sum of proper divisors (its aliquot sum) s(n): 98107268852286
• 81388493829378 is an abundant number, because the sum of its proper divisors (98107268852286) is greater than itself. Its abundance is 16718775022908

Bases of 81388493829378

• Binary: 10010100000010110111100010000110111010100000010₂
• Hexadecimal: 0x4A05BC437502
• Base-36: SULCVU58I

Squares and roots of 81388493829378

• 81388493829378 squared (81388493829378²) is 6624086927814700782575866884
• 81388493829378 cubed (81388493829378³) is 539124458049710247956871369508573136518152
• The square root of 81388493829378 is 9021557.1732034155
• The cube root of 81388493829378 is 43336.5502765831

Scales and comparisons

• 81,388,493,829,378 seconds is equal to 2,587,902 years, 18 weeks, 2 days, 8 hours, 36 minutes, 18 seconds.
• To count from 1 to 81,388,493,829,378 would take you about six million, four hundred sixty-nine thousand, seven hundred fifty-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 81388493829378 cubic inches would be around 3611.4 feet tall.

Recreational maths with 81388493829378

• 81388493829378 backwards is 87392839488318
• The number of decimal digits it has is: 14
• The sum of 81388493829378's digits is 81
• More coming soon!