257242570247 has 32 divisors (see below), whose sum is σ = 281481480000. Its totient is φ = 233676702720.

The previous prime is 257242570243. The next prime is 257242570261. The reversal of 257242570247 is 742075242752.

It is a cyclic number.

It is not a de Polignac number, because 257242570247 - 2² = 257242570243 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 (257242570243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 217816997 + ... + 217818177.

It is an arithmetic number, because the mean of its divisors is an integer number (8796296250).

Almost surely, 2^257242570247 is an apocalyptic number.

257242570247 is a deficient number, since it is larger than the sum of its proper divisors (24238909753).

257242570247 is a wasteful number, since it uses less digits than its factorization.

257242570247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291.

The product of its (nonzero) digits is 2195200, while the sum is 47.

The spelling of 257242570247 in words is "two hundred fifty-seven billion, two hundred forty-two million, five hundred seventy thousand, two hundred forty-seven".