91774656 has 84 divisors (see below), whose sum is σ = 265203432. Its totient is φ = 30342144.

The previous prime is 91774643. The next prime is 91774679. The reversal of 91774656 is 65647719.

It is a happy number.

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, 78331 + ... + 79493.

Almost surely, 2^91774656 is an apocalyptic number.

91774656 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 91774656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132601716).

91774656 is an abundant number, since it is smaller than the sum of its proper divisors (173428776).

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

91774656 is a wasteful number, since it uses less digits than its factorization.

91774656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318 (or 1305 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 91774656 is about 9579.9089766031. The cubic root of 91774656 is about 451.0668612760.

The spelling of 91774656 in words is "ninety-one million, seven hundred seventy-four thousand, six hundred fifty-six".