204740865289 has 9 divisors (see below), whose sum is σ = 207697744839. Its totient is φ = 201825517320.

The previous prime is 204740865257. The next prime is 204740865311. The reversal of 204740865289 is 982568047402.

The square root of 204740865289 is 452483.

It is a perfect power (a square), and thus also a powerful number.

204740865289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 169286988025 + 35453877264 = 411445^2 + 188292^2 .

It is not a de Polignac number, because 204740865289 - 2⁵ = 204740865257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204740365289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 32123107 + ... + 32129479.

Almost surely, 2^204740865289 is an apocalyptic number.

204740865289 is the 452483-rd square number.

204740865289 is the 226242-nd centered octagonal number.

It is an amenable number.

204740865289 is a deficient number, since it is larger than the sum of its proper divisors (2956879550).

204740865289 is an frugal number, since it uses more digits than its factorization.

204740865289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12888 (or 6444 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 55.

The spelling of 204740865289 in words is "two hundred four billion, seven hundred forty million, eight hundred sixty-five thousand, two hundred eighty-nine".