257708831284 has 12 divisors (see below), whose sum is σ = 451014701508. Its totient is φ = 128847488000.

The previous prime is 257708831257. The next prime is 257708831293. The reversal of 257708831284 is 482138807752.

It can be written as a sum of positive squares in 2 ways, for example, as 174037483684 + 83671347600 = 417178^2 + 289260^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1647757 + ... + 1797364.

It is an arithmetic number, because the mean of its divisors is an integer number (37584558459).

Almost surely, 2^257708831284 is an apocalyptic number.

It is an amenable number.

257708831284 is a deficient number, since it is larger than the sum of its proper divisors (193305870224).

257708831284 is a wasteful number, since it uses less digits than its factorization.

257708831284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3463826 (or 3463824 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 55.

The spelling of 257708831284 in words is "two hundred fifty-seven billion, seven hundred eight million, eight hundred thirty-one thousand, two hundred eighty-four".