78671708576 has 24 divisors (see below), whose sum is σ = 156015481860. Its totient is φ = 39048729088.

The previous prime is 78671708561. The next prime is 78671708611. The reversal of 78671708576 is 67580717687.

It can be written as a sum of positive squares in 2 ways, for example, as 78554636176 + 117072400 = 280276^2 + 10820^2 .

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, 8968211 + ... + 8976978.

Almost surely, 2^78671708576 is an apocalyptic number.

It is an amenable number.

78671708576 is a deficient number, since it is larger than the sum of its proper divisors (77343773284).

78671708576 is a wasteful number, since it uses less digits than its factorization.

78671708576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17945336 (or 17945328 counting only the distinct ones).

The product of its (nonzero) digits is 27659520, while the sum is 62.

The spelling of 78671708576 in words is "seventy-eight billion, six hundred seventy-one million, seven hundred eight thousand, five hundred seventy-six".