78674357656 has 32 divisors (see below), whose sum is σ = 148167306000. Its totient is φ = 39163216000.

The previous prime is 78674357623. The next prime is 78674357677. The reversal of 78674357656 is 65675347687.

It is a congruent 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, 5400270 + ... + 5414818.

Almost surely, 2^78674357656 is an apocalyptic number.

It is an amenable number.

78674357656 is a deficient number, since it is larger than the sum of its proper divisors (69492948344).

78674357656 is a wasteful number, since it uses less digits than its factorization.

78674357656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17499 (or 17495 counting only the distinct ones).

The product of its digits is 177811200, while the sum is 64.

The spelling of 78674357656 in words is "seventy-eight billion, six hundred seventy-four million, three hundred fifty-seven thousand, six hundred fifty-six".