325661568 has 64 divisors (see below), whose sum is σ = 888456720. Its totient is φ = 105615360.

The previous prime is 325661563. The next prime is 325661597. The reversal of 325661568 is 865166523.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (325661563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2748 + ... + 25668.

Almost surely, 2^325661568 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 325661568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (444228360).

325661568 is an abundant number, since it is smaller than the sum of its proper divisors (562795152).

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

325661568 is a wasteful number, since it uses less digits than its factorization.

325661568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22975 (or 22963 counting only the distinct ones).

The product of its digits is 259200, while the sum is 42.

The square root of 325661568 is about 18046.0956442107. The cubic root of 325661568 is about 688.0006309711. Note that the first 3 decimals are identical.

The spelling of 325661568 in words is "three hundred twenty-five million, six hundred sixty-one thousand, five hundred sixty-eight".