204135664 has 40 divisors (see below), whose sum is σ = 405599040. Its totient is φ = 99483648.

The previous prime is 204135653. The next prime is 204135683. The reversal of 204135664 is 466531402.

204135664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265072 + ... + 265840.

It is an arithmetic number, because the mean of its divisors is an integer number (10139976).

Almost surely, 2^204135664 is an apocalyptic number.

It is an amenable number.

204135664 is a deficient number, since it is larger than the sum of its proper divisors (201463376).

204135664 is a wasteful number, since it uses less digits than its factorization.

204135664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177 (or 1171 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 204135664 is about 14287.6052577050. The cubic root of 204135664 is about 588.8069965841.

The spelling of 204135664 in words is "two hundred four million, one hundred thirty-five thousand, six hundred sixty-four".