257244816682 has 24 divisors (see below), whose sum is σ = 472490483040. Its totient is φ = 104445263160.

The previous prime is 257244816659. The next prime is 257244816707. The reversal of 257244816682 is 286618442752.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69075694 + ... + 69079417.

It is an arithmetic number, because the mean of its divisors is an integer number (19687103460).

Almost surely, 2^257244816682 is an apocalyptic number.

257244816682 is a deficient number, since it is larger than the sum of its proper divisors (215245666358).

257244816682 is a wasteful number, since it uses less digits than its factorization.

257244816682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138155146 (or 138155139 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 55.

The spelling of 257244816682 in words is "two hundred fifty-seven billion, two hundred forty-four million, eight hundred sixteen thousand, six hundred eighty-two".