257679954782 has 4 divisors (see below), whose sum is σ = 386519932176. Its totient is φ = 128839977390.

The previous prime is 257679954769. The next prime is 257679954787. The reversal of 257679954782 is 287459976752.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257679954787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64419988694 + ... + 64419988697.

It is an arithmetic number, because the mean of its divisors is an integer number (96629983044).

Almost surely, 2^257679954782 is an apocalyptic number.

257679954782 is a deficient number, since it is larger than the sum of its proper divisors (128839977394).

257679954782 is a wasteful number, since it uses less digits than its factorization.

257679954782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128839977393.

The product of its digits is 533433600, while the sum is 71.

The spelling of 257679954782 in words is "two hundred fifty-seven billion, six hundred seventy-nine million, nine hundred fifty-four thousand, seven hundred eighty-two".