78836994656 has 48 divisors (see below), whose sum is σ = 177406225920. Its totient is φ = 33782904960.

The previous prime is 78836994617. The next prime is 78836994661. The reversal of 78836994656 is 65649963887.

It is a self number, because there is not a number n which added to its sum of digits gives 78836994656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2186051 + ... + 2221821.

It is an arithmetic number, because the mean of its divisors is an integer number (3695963040).

Almost surely, 2^78836994656 is an apocalyptic number.

It is an amenable number.

78836994656 is an abundant number, since it is smaller than the sum of its proper divisors (98569231264).

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

78836994656 is a wasteful number, since it uses less digits than its factorization.

78836994656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45627 (or 45619 counting only the distinct ones).

The product of its digits is 470292480, while the sum is 71.

The spelling of 78836994656 in words is "seventy-eight billion, eight hundred thirty-six million, nine hundred ninety-four thousand, six hundred fifty-six".