91806056 has 8 divisors (see below), whose sum is σ = 172136370. Its totient is φ = 45903024.

The previous prime is 91806031. The next prime is 91806067. The reversal of 91806056 is 65060819.

It can be written as a sum of positive squares in only one way, i.e., 65448100 + 26357956 = 8090^2 + 5134^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5737871 + ... + 5737886.

Almost surely, 2^91806056 is an apocalyptic number.

It is an amenable number.

91806056 is a deficient number, since it is larger than the sum of its proper divisors (80330314).

91806056 is a wasteful number, since it uses less digits than its factorization.

91806056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11475763 (or 11475759 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 91806056 is about 9581.5476829164. The cubic root of 91806056 is about 451.1182984413.

The spelling of 91806056 in words is "ninety-one million, eight hundred six thousand, fifty-six".