257595147197 has 2 divisors, whose sum is σ = 257595147198. Its totient is φ = 257595147196.

The previous prime is 257595147193. The next prime is 257595147221. The reversal of 257595147197 is 791741595752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255076512601 + 2518634596 = 505051^2 + 50186^2 .

It is a cyclic number.

It is not a de Polignac number, because 257595147197 - 2² = 257595147193 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257595147193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128797573598 + 128797573599.

It is an arithmetic number, because the mean of its divisors is an integer number (128797573599).

Almost surely, 2^257595147197 is an apocalyptic number.

It is an amenable number.

257595147197 is a deficient number, since it is larger than the sum of its proper divisors (1).

257595147197 is an equidigital number, since it uses as much as digits as its factorization.

257595147197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27783000, while the sum is 62.

The spelling of 257595147197 in words is "two hundred fifty-seven billion, five hundred ninety-five million, one hundred forty-seven thousand, one hundred ninety-seven".