204560641 has 4 divisors (see below), whose sum is σ = 204685312. Its totient is φ = 204435972.

The previous prime is 204560639. The next prime is 204560647. The reversal of 204560641 is 146065402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 204560641 - 2¹ = 204560639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204560647) 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, 59841 + ... + 63166.

It is an arithmetic number, because the mean of its divisors is an integer number (51171328).

Almost surely, 2^204560641 is an apocalyptic number.

It is an amenable number.

204560641 is a deficient number, since it is larger than the sum of its proper divisors (124671).

204560641 is a wasteful number, since it uses less digits than its factorization.

204560641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124670.

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

The square root of 204560641 is about 14302.4697517597. The cubic root of 204560641 is about 589.2153132579.

The spelling of 204560641 in words is "two hundred four million, five hundred sixty thousand, six hundred forty-one".