257010244391 has 2 divisors, whose sum is σ = 257010244392. Its totient is φ = 257010244390.

The previous prime is 257010244363. The next prime is 257010244493. The reversal of 257010244391 is 193442010752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257010244391 - 2¹⁸ = 257009982247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257010244331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128505122195 + 128505122196.

It is an arithmetic number, because the mean of its divisors is an integer number (128505122196).

Almost surely, 2^257010244391 is an apocalyptic number.

257010244391 is a deficient number, since it is larger than the sum of its proper divisors (1).

257010244391 is an equidigital number, since it uses as much as digits as its factorization.

257010244391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 257010244391 in words is "two hundred fifty-seven billion, ten million, two hundred forty-four thousand, three hundred ninety-one".