91055856 has 40 divisors (see below), whose sum is σ = 236470480. Its totient is φ = 30191616.

The previous prime is 91055849. The next prime is 91055863. The reversal of 91055856 is 65855019.

It is an interprime number because it is at equal distance from previous prime (91055849) and next prime (91055863).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4350 + ... + 14178.

It is an arithmetic number, because the mean of its divisors is an integer number (5911762).

Almost surely, 2^91055856 is an apocalyptic number.

It is an amenable number.

91055856 is an abundant number, since it is smaller than the sum of its proper divisors (145414624).

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

91055856 is a wasteful number, since it uses less digits than its factorization.

91055856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10033 (or 10027 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 39.

The square root of 91055856 is about 9542.3192149498. The cubic root of 91055856 is about 449.8861539164.

The spelling of 91055856 in words is "ninety-one million, fifty-five thousand, eight hundred fifty-six".