91170256530 has 32 divisors (see below), whose sum is σ = 218996841024. Its totient is φ = 24291154496.

The previous prime is 91170256523. The next prime is 91170256543. The reversal of 91170256530 is 3565207119.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1271649 + ... + 1341428.

It is an arithmetic number, because the mean of its divisors is an integer number (6843651282).

Almost surely, 2^91170256530 is an apocalyptic number.

91170256530 is an abundant number, since it is smaller than the sum of its proper divisors (127826584494).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91170256530 is a wasteful number, since it uses less digits than its factorization.

91170256530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2614250.

The product of its (nonzero) digits is 56700, while the sum is 39.

The spelling of 91170256530 in words is "ninety-one billion, one hundred seventy million, two hundred fifty-six thousand, five hundred thirty".