78064656 has 40 divisors (see below), whose sum is σ = 206590944. Its totient is φ = 25386240.

The previous prime is 78064633. The next prime is 78064681. The reversal of 78064656 is 65646087.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17866 + ... + 21801.

Almost surely, 2^78064656 is an apocalyptic number.

It is an amenable number.

78064656 is an abundant number, since it is smaller than the sum of its proper divisors (128526288).

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

78064656 is a wasteful number, since it uses less digits than its factorization.

78064656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39719 (or 39713 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 78064656 is about 8835.4205332853. The cubic root of 78064656 is about 427.3838924108.

The spelling of 78064656 in words is "seventy-eight million, sixty-four thousand, six hundred fifty-six".