204004844557 has 2 divisors, whose sum is σ = 204004844558. Its totient is φ = 204004844556.

The previous prime is 204004844543. The next prime is 204004844587. The reversal of 204004844557 is 755448400402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189271982916 + 14732861641 = 435054^2 + 121379^2 .

It is a cyclic number.

It is not a de Polignac number, because 204004844557 - 2⁷ = 204004844429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204004844587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102002422278 + 102002422279.

It is an arithmetic number, because the mean of its divisors is an integer number (102002422279).

Almost surely, 2^204004844557 is an apocalyptic number.

It is an amenable number.

204004844557 is a deficient number, since it is larger than the sum of its proper divisors (1).

204004844557 is an equidigital number, since it uses as much as digits as its factorization.

204004844557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 716800, while the sum is 43.

The spelling of 204004844557 in words is "two hundred four billion, four million, eight hundred forty-four thousand, five hundred fifty-seven".