91501056 has 80 divisors (see below), whose sum is σ = 270890400. Its totient is φ = 30495744.

The previous prime is 91501027. The next prime is 91501063. The reversal of 91501056 is 65010519.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

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, 10515 + ... + 17133.

It is an arithmetic number, because the mean of its divisors is an integer number (3386130).

Almost surely, 2^91501056 is an apocalyptic number.

91501056 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91501056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135445200).

91501056 is an abundant number, since it is smaller than the sum of its proper divisors (179389344).

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

91501056 is an equidigital number, since it uses as much as digits as its factorization.

91501056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6646 (or 6624 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 27.

The square root of 91501056 is about 9565.6184326995. The cubic root of 91501056 is about 450.6181726391.

The spelling of 91501056 in words is "ninety-one million, five hundred one thousand, fifty-six".