204155564 has 24 divisors (see below), whose sum is σ = 366735600. Its totient is φ = 99384320.

The previous prime is 204155537. The next prime is 204155569. The reversal of 204155564 is 465551402.

It is a self number, because there is not a number n which added to its sum of digits gives 204155564.

It is not an unprimeable number, because it can be changed into a prime (204155569) 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 7 ways as a sum of consecutive naturals, for example, 107132 + ... + 109020.

It is an arithmetic number, because the mean of its divisors is an integer number (15280650).

Almost surely, 2^204155564 is an apocalyptic number.

It is an amenable number.

204155564 is a deficient number, since it is larger than the sum of its proper divisors (162580036).

204155564 is a wasteful number, since it uses less digits than its factorization.

204155564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2593 (or 2591 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 204155564 is about 14288.3016485515. The cubic root of 204155564 is about 588.8261290869.

The spelling of 204155564 in words is "two hundred four million, one hundred fifty-five thousand, five hundred sixty-four".