91077177896 has 16 divisors (see below), whose sum is σ = 171522001440. Its totient is φ = 45337977520.

The previous prime is 91077177883. The next prime is 91077177949. The reversal of 91077177896 is 69877177019.

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, 25074500 + ... + 25078131.

It is an arithmetic number, because the mean of its divisors is an integer number (10720125090).

Almost surely, 2^91077177896 is an apocalyptic number.

It is an amenable number.

91077177896 is a deficient number, since it is larger than the sum of its proper divisors (80444823544).

91077177896 is a wasteful number, since it uses less digits than its factorization.

91077177896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50152864 (or 50152860 counting only the distinct ones).

The product of its (nonzero) digits is 9335088, while the sum is 62.

The spelling of 91077177896 in words is "ninety-one billion, seventy-seven million, one hundred seventy-seven thousand, eight hundred ninety-six".