91549656 has 128 divisors (see below), whose sum is σ = 283046400. Its totient is φ = 27181440.

The previous prime is 91549631. The next prime is 91549673. The reversal of 91549656 is 65694519.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125565 + ... + 126291.

It is an arithmetic number, because the mean of its divisors is an integer number (2211300).

Almost surely, 2^91549656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91549656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141523200).

91549656 is an abundant number, since it is smaller than the sum of its proper divisors (191496744).

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

91549656 is a wasteful number, since it uses less digits than its factorization.

91549656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806 (or 796 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The square root of 91549656 is about 9568.1584435042. The cubic root of 91549656 is about 450.6979391757.

The spelling of 91549656 in words is "ninety-one million, five hundred forty-nine thousand, six hundred fifty-six".