257444730172 has 24 divisors (see below), whose sum is σ = 515051502560. Its totient is φ = 110298732480.

The previous prime is 257444730157. The next prime is 257444730199. The reversal of 257444730172 is 271037444752.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1356147 + ... + 1534282.

Almost surely, 2^257444730172 is an apocalyptic number.

It is an amenable number.

257444730172 is an abundant number, since it is smaller than the sum of its proper divisors (257606772388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257444730172 is a wasteful number, since it uses less digits than its factorization.

257444730172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2893621 (or 2893619 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 46.

The spelling of 257444730172 in words is "two hundred fifty-seven billion, four hundred forty-four million, seven hundred thirty thousand, one hundred seventy-two".