257395257467 has 8 divisors (see below), whose sum is σ = 260288992656. Its totient is φ = 254517554592.

The previous prime is 257395257461. The next prime is 257395257491. The reversal of 257395257467 is 764752593752.

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

It is a cyclic number.

It is not a de Polignac number, because 257395257467 - 2⁶ = 257395257403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257395257461) 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, 3975788 + ... + 4040009.

It is an arithmetic number, because the mean of its divisors is an integer number (32536124082).

Almost surely, 2^257395257467 is an apocalyptic number.

257395257467 is a deficient number, since it is larger than the sum of its proper divisors (2893735189).

257395257467 is a wasteful number, since it uses less digits than its factorization.

257395257467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8016157.

The product of its digits is 111132000, while the sum is 62.

The spelling of 257395257467 in words is "two hundred fifty-seven billion, three hundred ninety-five million, two hundred fifty-seven thousand, four hundred sixty-seven".