204501664 has 24 divisors (see below), whose sum is σ = 413496468. Its totient is φ = 99486720.

The previous prime is 204501641. The next prime is 204501667. The reversal of 204501664 is 466105402.

It can be written as a sum of positive squares in 2 ways, for example, as 204490000 + 11664 = 14300^2 + 108^2 .

It is not an unprimeable number, because it can be changed into a prime (204501667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85177 + ... + 87544.

Almost surely, 2^204501664 is an apocalyptic number.

It is an amenable number.

204501664 is an abundant number, since it is smaller than the sum of its proper divisors (208994804).

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

204501664 is a wasteful number, since it uses less digits than its factorization.

204501664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172768 (or 172760 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 204501664 is about 14300.4078263524. The cubic root of 204501664 is about 589.1586821427.

The spelling of 204501664 in words is "two hundred four million, five hundred one thousand, six hundred sixty-four".