204556645 has 8 divisors (see below), whose sum is σ = 246337056. Its totient is φ = 163065936.

The previous prime is 204556589. The next prime is 204556657. The reversal of 204556645 is 546655402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204556645 - 2¹⁵ = 204523877 is a prime.

It is a Duffinian number.

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, 70867 + ... + 73696.

It is an arithmetic number, because the mean of its divisors is an integer number (30792132).

Almost surely, 2^204556645 is an apocalyptic number.

It is an amenable number.

204556645 is a deficient number, since it is larger than the sum of its proper divisors (41780411).

204556645 is a wasteful number, since it uses less digits than its factorization.

204556645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144851.

The product of its (nonzero) digits is 144000, while the sum is 37.

The square root of 204556645 is about 14302.3300549246. The cubic root of 204556645 is about 589.2114765477.

The spelling of 204556645 in words is "two hundred four million, five hundred fifty-six thousand, six hundred forty-five".