325521680 has 80 divisors (see below), whose sum is σ = 869140800. Its totient is φ = 112135680.

The previous prime is 325521667. The next prime is 325521689. The reversal of 325521680 is 86125523.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (325521689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6986 + ... + 26454.

It is an arithmetic number, because the mean of its divisors is an integer number (10864260).

Almost surely, 2^325521680 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 325521680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (434570400).

325521680 is an abundant number, since it is smaller than the sum of its proper divisors (543619120).

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

325521680 is a wasteful number, since it uses less digits than its factorization.

325521680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19512 (or 19506 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 325521680 is about 18042.2193756755. The cubic root of 325521680 is about 687.9021065873.

The spelling of 325521680 in words is "three hundred twenty-five million, five hundred twenty-one thousand, six hundred eighty".