257586097961 has 2 divisors, whose sum is σ = 257586097962. Its totient is φ = 257586097960.

The previous prime is 257586097939. The next prime is 257586098017. The reversal of 257586097961 is 169790685752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215337762025 + 42248335936 = 464045^2 + 205544^2 .

It is a cyclic number.

It is not a de Polignac number, because 257586097961 - 2¹⁸ = 257585835817 is a prime.

It is not a weakly prime, because it can be changed into another prime (257586097861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128793048980 + 128793048981.

It is an arithmetic number, because the mean of its divisors is an integer number (128793048981).

Almost surely, 2^257586097961 is an apocalyptic number.

It is an amenable number.

257586097961 is a deficient number, since it is larger than the sum of its proper divisors (1).

257586097961 is an equidigital number, since it uses as much as digits as its factorization.

257586097961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57153600, while the sum is 65.

The spelling of 257586097961 in words is "two hundred fifty-seven billion, five hundred eighty-six million, ninety-seven thousand, nine hundred sixty-one".