204655234517 has 2 divisors, whose sum is σ = 204655234518. Its totient is φ = 204655234516.

The previous prime is 204655234481. The next prime is 204655234541. The reversal of 204655234517 is 715432556402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195447104836 + 9208129681 = 442094^2 + 95959^2 .

It is a cyclic number.

It is not a de Polignac number, because 204655234517 - 2¹⁶ = 204655168981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204655234577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102327617258 + 102327617259.

It is an arithmetic number, because the mean of its divisors is an integer number (102327617259).

Almost surely, 2^204655234517 is an apocalyptic number.

It is an amenable number.

204655234517 is a deficient number, since it is larger than the sum of its proper divisors (1).

204655234517 is an equidigital number, since it uses as much as digits as its factorization.

204655234517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008000, while the sum is 44.

The spelling of 204655234517 in words is "two hundred four billion, six hundred fifty-five million, two hundred thirty-four thousand, five hundred seventeen".