91183664 has 60 divisors (see below), whose sum is σ = 209184528. Its totient is φ = 38248320.

The previous prime is 91183663. The next prime is 91183681. The reversal of 91183664 is 46638119.

It is not an unprimeable number, because it can be changed into a prime (91183663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23357 + ... + 26979.

Almost surely, 2^91183664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91183664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104592264).

91183664 is an abundant number, since it is smaller than the sum of its proper divisors (118000864).

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

91183664 is a wasteful number, since it uses less digits than its factorization.

91183664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3666 (or 3649 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 91183664 is about 9549.0137710656. The cubic root of 91183664 is about 450.0965455402.

The spelling of 91183664 in words is "ninety-one million, one hundred eighty-three thousand, six hundred sixty-four".