91078656 has 120 divisors (see below), whose sum is σ = 259514640. Its totient is φ = 28311552.

The previous prime is 91078619. The next prime is 91078679. The reversal of 91078656 is 65687019.

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, 835530 + ... + 835638.

It is an arithmetic number, because the mean of its divisors is an integer number (2162622).

Almost surely, 2^91078656 is an apocalyptic number.

91078656 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 91078656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129757320).

91078656 is an abundant number, since it is smaller than the sum of its proper divisors (168435984).

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

91078656 is a wasteful number, since it uses less digits than its factorization.

91078656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 91078656 is about 9543.5138182956. The cubic root of 91078656 is about 449.9237006441.

The spelling of 91078656 in words is "ninety-one million, seventy-eight thousand, six hundred fifty-six".