78642865008 has 50 divisors (see below), whose sum is σ = 227615271224. Its totient is φ = 26214287904.

The previous prime is 78642864997. The next prime is 78642865013. The reversal of 78642865008 is 80056824687.

78642865008 is a `hidden beast` number, since 78 + 64 + 2 + 8 + 6 + 500 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 30339316 + ... + 30341907.

Almost surely, 2^78642865008 is an apocalyptic number.

It is an amenable number.

78642865008 is an abundant number, since it is smaller than the sum of its proper divisors (148972406216).

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

78642865008 is a wasteful number, since it uses less digits than its factorization.

78642865008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60681243 (or 60681228 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 54.

The spelling of 78642865008 in words is "seventy-eight billion, six hundred forty-two million, eight hundred sixty-five thousand, eight".