78555756 has 12 divisors (see below), whose sum is σ = 183296792. Its totient is φ = 26185248.

The previous prime is 78555703. The next prime is 78555769. The reversal of 78555756 is 65755587.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3273145 + ... + 3273168.

Almost surely, 2^78555756 is an apocalyptic number.

It is an amenable number.

78555756 is an abundant number, since it is smaller than the sum of its proper divisors (104741036).

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

78555756 is a wasteful number, since it uses less digits than its factorization.

78555756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6546320 (or 6546318 counting only the distinct ones).

The product of its digits is 1470000, while the sum is 48.

The square root of 78555756 is about 8863.1685079321. The cubic root of 78555756 is about 428.2782349586.

The spelling of 78555756 in words is "seventy-eight million, five hundred fifty-five thousand, seven hundred fifty-six".