78643579328 has 28 divisors (see below), whose sum is σ = 160276150872. Its totient is φ = 38259037440.

The previous prime is 78643579319. The next prime is 78643579349. The reversal of 78643579328 is 82397534687.

It is a congruent number.

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, 16603118 + ... + 16607853.

Almost surely, 2^78643579328 is an apocalyptic number.

It is an amenable number.

78643579328 is an abundant number, since it is smaller than the sum of its proper divisors (81632571544).

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

78643579328 is a wasteful number, since it uses less digits than its factorization.

78643579328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33211020 (or 33211010 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 62.

The spelling of 78643579328 in words is "seventy-eight billion, six hundred forty-three million, five hundred seventy-nine thousand, three hundred twenty-eight".