205265316089 has 2 divisors, whose sum is σ = 205265316090. Its totient is φ = 205265316088.

The previous prime is 205265316007. The next prime is 205265316119. The reversal of 205265316089 is 980613562502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164008800400 + 41256515689 = 404980^2 + 203117^2 .

It is a cyclic number.

It is not a de Polignac number, because 205265316089 - 2⁸ = 205265315833 is a prime.

It is not a weakly prime, because it can be changed into another prime (205265306089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102632658044 + 102632658045.

It is an arithmetic number, because the mean of its divisors is an integer number (102632658045).

Almost surely, 2^205265316089 is an apocalyptic number.

It is an amenable number.

205265316089 is a deficient number, since it is larger than the sum of its proper divisors (1).

205265316089 is an equidigital number, since it uses as much as digits as its factorization.

205265316089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 777600, while the sum is 47.

The spelling of 205265316089 in words is "two hundred five billion, two hundred sixty-five million, three hundred sixteen thousand, eighty-nine".