257803479863 has 2 divisors, whose sum is σ = 257803479864. Its totient is φ = 257803479862.

The previous prime is 257803479859. The next prime is 257803479893. The reversal of 257803479863 is 368974308752.

257803479863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257803479863 - 2² = 257803479859 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 257803479796 and 257803479805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257803479803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128901739931 + 128901739932.

It is an arithmetic number, because the mean of its divisors is an integer number (128901739932).

Almost surely, 2^257803479863 is an apocalyptic number.

257803479863 is a deficient number, since it is larger than the sum of its proper divisors (1).

257803479863 is an equidigital number, since it uses as much as digits as its factorization.

257803479863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60963840, while the sum is 62.

The spelling of 257803479863 in words is "two hundred fifty-seven billion, eight hundred three million, four hundred seventy-nine thousand, eight hundred sixty-three".