257578471648 has 48 divisors (see below), whose sum is σ = 508590956160. Its totient is φ = 128412979200.

The previous prime is 257578471589. The next prime is 257578471679. The reversal of 257578471648 is 846174875752.

257578471648 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 257578471648.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20241928 + ... + 20254648.

It is an arithmetic number, because the mean of its divisors is an integer number (10595644920).

Almost surely, 2^257578471648 is an apocalyptic number.

It is an amenable number.

257578471648 is a deficient number, since it is larger than the sum of its proper divisors (251012484512).

257578471648 is a wasteful number, since it uses less digits than its factorization.

257578471648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14531 (or 14523 counting only the distinct ones).

The product of its digits is 105369600, while the sum is 64.

The spelling of 257578471648 in words is "two hundred fifty-seven billion, five hundred seventy-eight million, four hundred seventy-one thousand, six hundred forty-eight".