91900175085 has 48 divisors (see below), whose sum is σ = 163225782720. Its totient is φ = 47804225280.

The previous prime is 91900175069. The next prime is 91900175119. The reversal of 91900175085 is 58057100919.

It is not a de Polignac number, because 91900175085 - 2⁴ = 91900175069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 91900175085.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10953262 + ... + 10961648.

It is an arithmetic number, because the mean of its divisors is an integer number (3400537140).

Almost surely, 2^91900175085 is an apocalyptic number.

It is an amenable number.

91900175085 is a deficient number, since it is larger than the sum of its proper divisors (71325607635).

91900175085 is a wasteful number, since it uses less digits than its factorization.

91900175085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14378 (or 14375 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 45.

The spelling of 91900175085 in words is "ninety-one billion, nine hundred million, one hundred seventy-five thousand, eighty-five".