91090180375 has 16 divisors (see below), whose sum is σ = 118623181248. Its totient is φ = 69703788000.

The previous prime is 91090180339. The next prime is 91090180393. The reversal of 91090180375 is 57308109019.

It is not a de Polignac number, because 91090180375 - 2¹³ = 91090172183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15838896 + ... + 15844645.

It is an arithmetic number, because the mean of its divisors is an integer number (7413948828).

Almost surely, 2^91090180375 is an apocalyptic number.

91090180375 is a deficient number, since it is larger than the sum of its proper divisors (27533000873).

91090180375 is a wasteful number, since it uses less digits than its factorization.

91090180375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31683579 (or 31683569 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 43.

The spelling of 91090180375 in words is "ninety-one billion, ninety million, one hundred eighty thousand, three hundred seventy-five".