257409254863 has 8 divisors (see below), whose sum is σ = 263412547200. Its totient is φ = 251406736728.

The previous prime is 257409254849. The next prime is 257409254867. The reversal of 257409254863 is 368452904752.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 257409254863 - 2²⁵ = 257375700431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257409254867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 508518 + ... + 879436.

It is an arithmetic number, because the mean of its divisors is an integer number (32926568400).

Almost surely, 2^257409254863 is an apocalyptic number.

257409254863 is a deficient number, since it is larger than the sum of its proper divisors (6003292337).

257409254863 is a wasteful number, since it uses less digits than its factorization.

257409254863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387101.

The product of its (nonzero) digits is 14515200, while the sum is 55.

The spelling of 257409254863 in words is "two hundred fifty-seven billion, four hundred nine million, two hundred fifty-four thousand, eight hundred sixty-three".