78530640936 has 64 divisors (see below), whose sum is σ = 214249129920. Its totient is φ = 23788869120.

The previous prime is 78530640919. The next prime is 78530640961. The reversal of 78530640936 is 63904603587.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 729226 + ... + 829958.

It is an arithmetic number, because the mean of its divisors is an integer number (3347642655).

Almost surely, 2^78530640936 is an apocalyptic number.

It is an amenable number.

78530640936 is an abundant number, since it is smaller than the sum of its proper divisors (135718488984).

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

78530640936 is a wasteful number, since it uses less digits than its factorization.

78530640936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103706 (or 103702 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 51.

The spelling of 78530640936 in words is "seventy-eight billion, five hundred thirty million, six hundred forty thousand, nine hundred thirty-six".