78919605864 has 48 divisors (see below), whose sum is σ = 233171565120. Its totient is φ = 23915031840.

The previous prime is 78919605857. The next prime is 78919605907. The reversal of 78919605864 is 46850691987.

78919605864 is a `hidden beast` number, since 7 + 8 + 9 + 19 + 605 + 8 + 6 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49822192 + ... + 49823775.

It is an arithmetic number, because the mean of its divisors is an integer number (4857740940).

Almost surely, 2^78919605864 is an apocalyptic number.

It is an amenable number.

78919605864 is an abundant number, since it is smaller than the sum of its proper divisors (154251959256).

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

78919605864 is a wasteful number, since it uses less digits than its factorization.

78919605864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99645990 (or 99645983 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 63.

The spelling of 78919605864 in words is "seventy-eight billion, nine hundred nineteen million, six hundred five thousand, eight hundred sixty-four".