257702364343 has 2 divisors, whose sum is σ = 257702364344. Its totient is φ = 257702364342.

The previous prime is 257702364331. The next prime is 257702364427. The reversal of 257702364343 is 343463207752.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257702364343 - 2¹³ = 257702356151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 257702364293 and 257702364302.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257702367343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128851182171 + 128851182172.

It is an arithmetic number, because the mean of its divisors is an integer number (128851182172).

Almost surely, 2^257702364343 is an apocalyptic number.

257702364343 is a deficient number, since it is larger than the sum of its proper divisors (1).

257702364343 is an equidigital number, since it uses as much as digits as its factorization.

257702364343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2540160, while the sum is 46.

The spelling of 257702364343 in words is "two hundred fifty-seven billion, seven hundred two million, three hundred sixty-four thousand, three hundred forty-three".