257918273243 has 2 divisors, whose sum is σ = 257918273244. Its totient is φ = 257918273242.

The previous prime is 257918273237. The next prime is 257918273257. The reversal of 257918273243 is 342372819752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257918273243 - 2¹⁰ = 257918272219 is a prime.

It is not a weakly prime, because it can be changed into another prime (257918273203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128959136621 + 128959136622.

It is an arithmetic number, because the mean of its divisors is an integer number (128959136622).

Almost surely, 2^257918273243 is an apocalyptic number.

257918273243 is a deficient number, since it is larger than the sum of its proper divisors (1).

257918273243 is an equidigital number, since it uses as much as digits as its factorization.

257918273243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5080320, while the sum is 53.

The spelling of 257918273243 in words is "two hundred fifty-seven billion, nine hundred eighteen million, two hundred seventy-three thousand, two hundred forty-three".