78727636404 has 36 divisors (see below), whose sum is σ = 199014481120. Its totient is φ = 26241423120.

The previous prime is 78727636391. The next prime is 78727636453. The reversal of 78727636404 is 40463672787.

78727636404 is a `hidden beast` number, since 7 + 8 + 7 + 276 + 364 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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, 1649427 + ... + 1696485.

Almost surely, 2^78727636404 is an apocalyptic number.

It is an amenable number.

78727636404 is an abundant number, since it is smaller than the sum of its proper divisors (120286844716).

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

78727636404 is a wasteful number, since it uses less digits than its factorization.

78727636404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93540 (or 93535 counting only the distinct ones).

The product of its (nonzero) digits is 9483264, while the sum is 54.

The spelling of 78727636404 in words is "seventy-eight billion, seven hundred twenty-seven million, six hundred thirty-six thousand, four hundred four".