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79144143902 = 21953611135701
BaseRepresentation
bin100100110110101011…
…0111100110000011110
321120021200200002010222
41021231112330300132
52244041400101102
6100205221401342
75501160060215
oct1115526746036
9246250602128
1079144143902
113062389579a
1213409269252
137603a261a5
143b8b23007c
1520d32b1aa2
hex126d5bcc1e

79144143902 has 64 divisors (see below), whose sum is σ = 130577624640. Its totient is φ = 35852544000.

The previous prime is 79144143901. The next prime is 79144143907. The reversal of 79144143902 is 20934144197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79144143901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13879652 + ... + 13885352.

It is an arithmetic number, because the mean of its divisors is an integer number (2040275385).

Almost surely, 279144143902 is an apocalyptic number.

79144143902 is a deficient number, since it is larger than the sum of its proper divisors (51433480738).

79144143902 is a wasteful number, since it uses less digits than its factorization.

79144143902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5949.

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 79144143902 in words is "seventy-nine billion, one hundred forty-four million, one hundred forty-three thousand, nine hundred two".

Divisors: 1 2 19 38 53 61 106 113 122 226 1007 1159 2014 2147 2318 3233 4294 5701 5989 6466 6893 11402 11978 13786 61427 108319 113791 122854 130967 216638 227582 261934 302153 347761 365329 604306 644213 695522 730658 1288426 5740907 6607459 6941251 11481814 12240047 13214918 13882502 18431333 24480094 34143289 36862666 39296993 68286578 78593986 350195327 648722491 700390654 746642867 1297444982 1493285734 2082740629 4165481258 39572071951 79144143902