257997681494 has 24 divisors (see below), whose sum is σ = 452781852048. Its totient is φ = 109931292240.

The previous prime is 257997681463. The next prime is 257997681509. The reversal of 257997681494 is 494186799752.

257997681494 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7591802 + ... + 7625709.

It is an arithmetic number, because the mean of its divisors is an integer number (18865910502).

Almost surely, 2^257997681494 is an apocalyptic number.

257997681494 is a deficient number, since it is larger than the sum of its proper divisors (194784170554).

257997681494 is a wasteful number, since it uses less digits than its factorization.

257997681494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15217700 (or 15217693 counting only the distinct ones).

The product of its digits is 274337280, while the sum is 71.

The spelling of 257997681494 in words is "two hundred fifty-seven billion, nine hundred ninety-seven million, six hundred eighty-one thousand, four hundred ninety-four".