91775974113 has 24 divisors (see below), whose sum is σ = 142945901280. Its totient is φ = 56550018240.

The previous prime is 91775974099. The next prime is 91775974139. The reversal of 91775974113 is 31147957719.

It is a happy number.

91775974113 is a `hidden beast` number, since 9 + 1 + 7 + 7 + 597 + 41 + 1 + 3 = 666.

It is not a de Polignac number, because 91775974113 - 2⁶ = 91775974049 is a prime.

It is a super-2 number, since 2×91775974113² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 91775974113.

It is not an unprimeable number, because it can be changed into a prime (91775974163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6538131 + ... + 6552152.

It is an arithmetic number, because the mean of its divisors is an integer number (5956079220).

Almost surely, 2^91775974113 is an apocalyptic number.

It is an amenable number.

91775974113 is a deficient number, since it is larger than the sum of its proper divisors (51169927167).

91775974113 is a wasteful number, since it uses less digits than its factorization.

91775974113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13090349 (or 13090346 counting only the distinct ones).

The product of its digits is 1666980, while the sum is 54.

The spelling of 91775974113 in words is "ninety-one billion, seven hundred seventy-five million, nine hundred seventy-four thousand, one hundred thirteen".