257605456 has 10 divisors (see below), whose sum is σ = 499110602. Its totient is φ = 128802720.

The previous prime is 257605441. The next prime is 257605457. The reversal of 257605456 is 654506752.

It can be written as a sum of positive squares in only one way, i.e., 222606400 + 34999056 = 14920^2 + 5916^2 .

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257605457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8050155 + ... + 8050186.

Almost surely, 2^257605456 is an apocalyptic number.

It is an amenable number.

257605456 is a deficient number, since it is larger than the sum of its proper divisors (241505146).

257605456 is a wasteful number, since it uses less digits than its factorization.

257605456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16100349 (or 16100343 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 40.

The square root of 257605456 is about 16050.0920869632. The cubic root of 257605456 is about 636.2850007571.

The spelling of 257605456 in words is "two hundred fifty-seven million, six hundred five thousand, four hundred fifty-six".