91115064 has 64 divisors (see below), whose sum is σ = 255405600. Its totient is φ = 30094848.

The previous prime is 91115047. The next prime is 91115077. The reversal of 91115064 is 46051119.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 22542 + ... + 26274.

Almost surely, 2^91115064 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 91115064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127702800).

91115064 is an abundant number, since it is smaller than the sum of its proper divisors (164290536).

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

91115064 is a wasteful number, since it uses less digits than its factorization.

91115064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3861 (or 3851 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 91115064 is about 9545.4211012401. The cubic root of 91115064 is about 449.9836438500.

The spelling of 91115064 in words is "ninety-one million, one hundred fifteen thousand, sixty-four".