91974601244 has 12 divisors (see below), whose sum is σ = 161226982224. Its totient is φ = 45909749184.

The previous prime is 91974601219. The next prime is 91974601297. The reversal of 91974601244 is 44210647919.

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, 19385192 + ... + 19389935.

It is an arithmetic number, because the mean of its divisors is an integer number (13435581852).

Almost surely, 2^91974601244 is an apocalyptic number.

It is an amenable number.

91974601244 is a deficient number, since it is larger than the sum of its proper divisors (69252380980).

91974601244 is a wasteful number, since it uses less digits than its factorization.

91974601244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38775724 (or 38775722 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 91974601244 in words is "ninety-one billion, nine hundred seventy-four million, six hundred one thousand, two hundred forty-four".