91564452 has 96 divisors (see below), whose sum is σ = 280125440. Its totient is φ = 25310880.

The previous prime is 91564427. The next prime is 91564453. The reversal of 91564452 is 25446519.

91564452 is a `hidden beast` number, since 9 + 1 + 5 + 644 + 5 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (91564453) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 21483 + ... + 25389.

Almost surely, 2^91564452 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 91564452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140062720).

91564452 is an abundant number, since it is smaller than the sum of its proper divisors (188560988).

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

91564452 is a wasteful number, since it uses less digits than its factorization.

91564452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3958 (or 3950 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 91564452 is about 9568.9316018038. The cubic root of 91564452 is about 450.7222180490.

The spelling of 91564452 in words is "ninety-one million, five hundred sixty-four thousand, four hundred fifty-two".