257697054751 has 2 divisors, whose sum is σ = 257697054752. Its totient is φ = 257697054750.

The previous prime is 257697054721. The next prime is 257697054757. The reversal of 257697054751 is 157450796752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257697054751 - 2⁷ = 257697054623 is a prime.

It is a congruent number.

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 (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128848527375 + 128848527376.

It is an arithmetic number, because the mean of its divisors is an integer number (128848527376).

Almost surely, 2^257697054751 is an apocalyptic number.

257697054751 is a deficient number, since it is larger than the sum of its proper divisors (1).

257697054751 is an equidigital number, since it uses as much as digits as its factorization.

257697054751 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18522000, while the sum is 58.

The spelling of 257697054751 in words is "two hundred fifty-seven billion, six hundred ninety-seven million, fifty-four thousand, seven hundred fifty-one".