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78808031796 = 223131373687443
BaseRepresentation
bin100100101100101010…
…0110010001000110100
321112102021012211000110
41021121110302020310
52242344324004141
6100112013343020
75456636134434
oct1113124621064
9245367184013
1078808031796
113047109679a
1213334797a70
13757c1c33a0
143b5873a2c4
1520b3a1ce16
hex1259532234

78808031796 has 48 divisors (see below), whose sum is σ = 199475970624. Its totient is φ = 24071621376.

The previous prime is 78808031779. The next prime is 78808031801. The reversal of 78808031796 is 69713080887.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1822350 + ... + 1865093.

It is an arithmetic number, because the mean of its divisors is an integer number (4155749388).

Almost surely, 278808031796 is an apocalyptic number.

It is an amenable number.

78808031796 is an abundant number, since it is smaller than the sum of its proper divisors (120667938828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78808031796 is a wasteful number, since it uses less digits than its factorization.

78808031796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3687600 (or 3687598 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 57.

The spelling of 78808031796 in words is "seventy-eight billion, eight hundred eight million, thirty-one thousand, seven hundred ninety-six".

Divisors: 1 2 3 4 6 12 13 26 39 52 78 137 156 274 411 548 822 1644 1781 3562 5343 7124 10686 21372 3687443 7374886 11062329 14749772 22124658 44249316 47936759 95873518 143810277 191747036 287620554 505179691 575241108 1010359382 1515539073 2020718764 3031078146 6062156292 6567335983 13134671966 19702007949 26269343932 39404015898 78808031796