257203430571149 has 2 divisors, whose sum is σ = 257203430571150. Its totient is φ = 257203430571148.

The previous prime is 257203430571097. The next prime is 257203430571173. The reversal of 257203430571149 is 941175034302752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202657716924100 + 54545713647049 = 14235790^2 + 7385507^2 .

It is a cyclic number.

It is not a de Polignac number, because 257203430571149 - 2²⁰ = 257203429522573 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 257203430571149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257203430571349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128601715285574 + 128601715285575.

It is an arithmetic number, because the mean of its divisors is an integer number (128601715285575).

Almost surely, 2^{257203430571149} is an apocalyptic number.

It is an amenable number.

257203430571149 is a deficient number, since it is larger than the sum of its proper divisors (1).

257203430571149 is an equidigital number, since it uses as much as digits as its factorization.

257203430571149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6350400, while the sum is 53.

The spelling of 257203430571149 in words is "two hundred fifty-seven trillion, two hundred three billion, four hundred thirty million, five hundred seventy-one thousand, one hundred forty-nine".