91910910023 has 32 divisors (see below), whose sum is σ = 103557242880. Its totient is φ = 81062208000.

The previous prime is 91910910017. The next prime is 91910910067. The reversal of 91910910023 is 32001901919.

It is not a de Polignac number, because 91910910023 - 2²⁰ = 91909861447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91910913023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11162318 + ... + 11170548.

It is an arithmetic number, because the mean of its divisors is an integer number (3236163840).

Almost surely, 2^91910910023 is an apocalyptic number.

91910910023 is a deficient number, since it is larger than the sum of its proper divisors (11646332857).

91910910023 is a wasteful number, since it uses less digits than its factorization.

91910910023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8639.

The product of its (nonzero) digits is 4374, while the sum is 35.

The spelling of 91910910023 in words is "ninety-one billion, nine hundred ten million, nine hundred ten thousand, twenty-three".