91605674192 has 20 divisors (see below), whose sum is σ = 177622247520. Its totient is φ = 45767674848.

The previous prime is 91605674189. The next prime is 91605674213. The reversal of 91605674192 is 29147650619.

It is a self number, because there is not a number n which added to its sum of digits gives 91605674192.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2176142 + ... + 2217837.

It is an arithmetic number, because the mean of its divisors is an integer number (8881112376).

Almost surely, 2^91605674192 is an apocalyptic number.

It is an amenable number.

91605674192 is a deficient number, since it is larger than the sum of its proper divisors (86016573328).

91605674192 is a wasteful number, since it uses less digits than its factorization.

91605674192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4395290 (or 4395284 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 50.

The spelling of 91605674192 in words is "ninety-one billion, six hundred five million, six hundred seventy-four thousand, one hundred ninety-two".