91256616 has 48 divisors (see below), whose sum is σ = 269624160. Its totient is φ = 27653280.

The previous prime is 91256603. The next prime is 91256651. The reversal of 91256616 is 61665219.

91256616 is a `hidden beast` number, since 91 + 2 + 566 + 1 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56820 + ... + 58403.

It is an arithmetic number, because the mean of its divisors is an integer number (5617170).

Almost surely, 2^91256616 is an apocalyptic number.

It is an amenable number.

91256616 is an abundant number, since it is smaller than the sum of its proper divisors (178367544).

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

91256616 is a wasteful number, since it uses less digits than its factorization.

91256616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115246 (or 115239 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 91256616 is about 9552.8328782618. The cubic root of 91256616 is about 450.2165476287.

The spelling of 91256616 in words is "ninety-one million, two hundred fifty-six thousand, six hundred sixteen".