76991608884 has 12 divisors (see below), whose sum is σ = 179647087424. Its totient is φ = 25663869624.

The previous prime is 76991608877. The next prime is 76991608901. The reversal of 76991608884 is 48880619967.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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, 3207983692 + ... + 3207983715.

Almost surely, 2^76991608884 is an apocalyptic number.

It is an amenable number.

76991608884 is an abundant number, since it is smaller than the sum of its proper divisors (102655478540).

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

76991608884 is a wasteful number, since it uses less digits than its factorization.

76991608884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6415967414 (or 6415967412 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 66.

The spelling of 76991608884 in words is "seventy-six billion, nine hundred ninety-one million, six hundred eight thousand, eight hundred eighty-four".