78886539812 has 12 divisors (see below), whose sum is σ = 145317310320. Its totient is φ = 37367308296.

The previous prime is 78886539737. The next prime is 78886539829. The reversal of 78886539812 is 21893568887.

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, 518990318 + ... + 518990469.

It is an arithmetic number, because the mean of its divisors is an integer number (12109775860).

Almost surely, 2^78886539812 is an apocalyptic number.

It is an amenable number.

78886539812 is a deficient number, since it is larger than the sum of its proper divisors (66430770508).

78886539812 is a wasteful number, since it uses less digits than its factorization.

78886539812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037980810 (or 1037980808 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 65.

The spelling of 78886539812 in words is "seventy-eight billion, eight hundred eighty-six million, five hundred thirty-nine thousand, eight hundred twelve".