91779446716 has 6 divisors (see below), whose sum is σ = 160614031760. Its totient is φ = 45889723356.

The previous prime is 91779446713. The next prime is 91779446783. The reversal of 91779446716 is 61764497719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91779446713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11472430836 + ... + 11472430843.

Almost surely, 2^91779446716 is an apocalyptic number.

It is an amenable number.

91779446716 is a deficient number, since it is larger than the sum of its proper divisors (68834585044).

91779446716 is a wasteful number, since it uses less digits than its factorization.

91779446716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22944861683 (or 22944861681 counting only the distinct ones).

The product of its digits is 16003008, while the sum is 61.

The spelling of 91779446716 in words is "ninety-one billion, seven hundred seventy-nine million, four hundred forty-six thousand, seven hundred sixteen".