78513122808 has 48 divisors (see below), whose sum is σ = 213105091680. Its totient is φ = 26113762944.

The previous prime is 78513122771. The next prime is 78513122839. The reversal of 78513122808 is 80822131587.

78513122808 is a `hidden beast` number, since 7 + 8 + 51 + 312 + 280 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1160160 + ... + 1225967.

It is an arithmetic number, because the mean of its divisors is an integer number (4439689410).

Almost surely, 2^78513122808 is an apocalyptic number.

It is an amenable number.

78513122808 is an abundant number, since it is smaller than the sum of its proper divisors (134591968872).

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

78513122808 is a wasteful number, since it uses less digits than its factorization.

78513122808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2386596 (or 2386589 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The spelling of 78513122808 in words is "seventy-eight billion, five hundred thirteen million, one hundred twenty-two thousand, eight hundred eight".