257697054707 has 2 divisors, whose sum is σ = 257697054708. Its totient is φ = 257697054706.

The previous prime is 257697054683. The next prime is 257697054721. The reversal of 257697054707 is 707450796752.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257697054707 - 2¹⁶ = 257696989171 is a prime.

It is not a weakly prime, because it can be changed into another prime (257697054757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128848527353 + 128848527354.

It is an arithmetic number, because the mean of its divisors is an integer number (128848527354).

Almost surely, 2^257697054707 is an apocalyptic number.

257697054707 is a deficient number, since it is larger than the sum of its proper divisors (1).

257697054707 is an equidigital number, since it uses as much as digits as its factorization.

257697054707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25930800, while the sum is 59.

The spelling of 257697054707 in words is "two hundred fifty-seven billion, six hundred ninety-seven million, fifty-four thousand, seven hundred seven".