257498623189 has 2 divisors, whose sum is σ = 257498623190. Its totient is φ = 257498623188.

The previous prime is 257498623163. The next prime is 257498623243. The reversal of 257498623189 is 981326894752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 257395904964 + 102718225 = 507342^2 + 10135^2 .

It is a cyclic number.

It is not a de Polignac number, because 257498623189 - 2¹⁷ = 257498492117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 257498623189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257498623289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128749311594 + 128749311595.

It is an arithmetic number, because the mean of its divisors is an integer number (128749311595).

Almost surely, 2^257498623189 is an apocalyptic number.

It is an amenable number.

257498623189 is a deficient number, since it is larger than the sum of its proper divisors (1).

257498623189 is an equidigital number, since it uses as much as digits as its factorization.

257498623189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52254720, while the sum is 64.

The spelling of 257498623189 in words is "two hundred fifty-seven billion, four hundred ninety-eight million, six hundred twenty-three thousand, one hundred eighty-nine".