79578297172800 has 126 divisors (see below), whose sum is σ = 282840057523478. Its totient is φ = 21220879242240.

The previous prime is 79578297172799. The next prime is 79578297172817. The reversal of 79578297172800 is 827179287597.

79578297172800 is a `hidden beast` number, since 7 + 9 + 57 + 8 + 297 + 1 + 7 + 280 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 8209187668224 + 71369109504576 = 2865168^2 + 8448024^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2763120919 + ... + 2763149718.

Almost surely, 2^{79578297172800} is an apocalyptic number.

It is an amenable number.

79578297172800 is an abundant number, since it is smaller than the sum of its proper divisors (203261760350678).

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

79578297172800 is a wasteful number, since it uses less digits than its factorization.

79578297172800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5526270665 (or 5526270647 counting only the distinct ones).

The product of its (nonzero) digits is 248935680, while the sum is 72.

The spelling of 79578297172800 in words is "seventy-nine trillion, five hundred seventy-eight billion, two hundred ninety-seven million, one hundred seventy-two thousand, eight hundred".