257504746463 has 2 divisors, whose sum is σ = 257504746464. Its totient is φ = 257504746462.

The previous prime is 257504746453. The next prime is 257504746469. The reversal of 257504746463 is 364647405752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257504746463 - 2⁶ = 257504746399 is a prime.

It is a super-2 number, since 2×257504746463² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257504746469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128752373231 + 128752373232.

It is an arithmetic number, because the mean of its divisors is an integer number (128752373232).

Almost surely, 2^257504746463 is an apocalyptic number.

257504746463 is a deficient number, since it is larger than the sum of its proper divisors (1).

257504746463 is an equidigital number, since it uses as much as digits as its factorization.

257504746463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16934400, while the sum is 53.

The spelling of 257504746463 in words is "two hundred fifty-seven billion, five hundred four million, seven hundred forty-six thousand, four hundred sixty-three".