257873866339 has 2 divisors, whose sum is σ = 257873866340. Its totient is φ = 257873866338.

The previous prime is 257873866319. The next prime is 257873866357. The reversal of 257873866339 is 933668378752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257873866339 - 2¹¹ = 257873864291 is a prime.

It is not a weakly prime, because it can be changed into another prime (257873866319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128936933169 + 128936933170.

It is an arithmetic number, because the mean of its divisors is an integer number (128936933170).

Almost surely, 2^257873866339 is an apocalyptic number.

257873866339 is a deficient number, since it is larger than the sum of its proper divisors (1).

257873866339 is an equidigital number, since it uses as much as digits as its factorization.

257873866339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 274337280, while the sum is 67.

The spelling of 257873866339 in words is "two hundred fifty-seven billion, eight hundred seventy-three million, eight hundred sixty-six thousand, three hundred thirty-nine".