77391934616 has 16 divisors (see below), whose sum is σ = 145159295400. Its totient is φ = 38682789184.

The previous prime is 77391934603. The next prime is 77391934657. The reversal of 77391934616 is 61643919377.

It is a happy number.

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, 1622285 + ... + 1669308.

Almost surely, 2^77391934616 is an apocalyptic number.

It is an amenable number.

77391934616 is a deficient number, since it is larger than the sum of its proper divisors (67767360784).

77391934616 is a wasteful number, since it uses less digits than its factorization.

77391934616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3294538 (or 3294534 counting only the distinct ones).

The product of its digits is 5143824, while the sum is 56.

The spelling of 77391934616 in words is "seventy-seven billion, three hundred ninety-one million, nine hundred thirty-four thousand, six hundred sixteen".