91116186 has 48 divisors (see below), whose sum is σ = 217183680. Its totient is φ = 25394880.

The previous prime is 91116167. The next prime is 91116187. The reversal of 91116186 is 68161119.

It is not an unprimeable number, because it can be changed into a prime (91116187) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8275 + ... + 15833.

It is an arithmetic number, because the mean of its divisors is an integer number (4524660).

Almost surely, 2^91116186 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91116186, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108591840).

91116186 is an abundant number, since it is smaller than the sum of its proper divisors (126067494).

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

91116186 is a wasteful number, since it uses less digits than its factorization.

91116186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7619 (or 7612 counting only the distinct ones).

The product of its digits is 2592, while the sum is 33.

The square root of 91116186 is about 9545.4798726937. The cubic root of 91116186 is about 449.9854908902.

The spelling of 91116186 in words is "ninety-one million, one hundred sixteen thousand, one hundred eighty-six".