91616210985 has 16 divisors (see below), whose sum is σ = 157861779264. Its totient is φ = 45103365312.

The previous prime is 91616210953. The next prime is 91616211013. The reversal of 91616210985 is 58901261619.

It is not a de Polignac number, because 91616210985 - 2⁵ = 91616210953 is a prime.

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, 234913167 + ... + 234913556.

It is an arithmetic number, because the mean of its divisors is an integer number (9866361204).

Almost surely, 2^91616210985 is an apocalyptic number.

It is an amenable number.

91616210985 is a deficient number, since it is larger than the sum of its proper divisors (66245568279).

91616210985 is a wasteful number, since it uses less digits than its factorization.

91616210985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469826744.

The product of its (nonzero) digits is 233280, while the sum is 48.

The spelling of 91616210985 in words is "ninety-one billion, six hundred sixteen million, two hundred ten thousand, nine hundred eighty-five".