257545268 has 6 divisors (see below), whose sum is σ = 450704226. Its totient is φ = 128772632.

The previous prime is 257545261. The next prime is 257545279. The reversal of 257545268 is 862545752.

It can be written as a sum of positive squares in only one way, i.e., 131836324 + 125708944 = 11482^2 + 11212^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257545261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32193155 + ... + 32193162.

It is an arithmetic number, because the mean of its divisors is an integer number (75117371).

Almost surely, 2^257545268 is an apocalyptic number.

It is an amenable number.

257545268 is a deficient number, since it is larger than the sum of its proper divisors (193158958).

257545268 is a wasteful number, since it uses less digits than its factorization.

257545268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64386321 (or 64386319 counting only the distinct ones).

The product of its digits is 672000, while the sum is 44.

The square root of 257545268 is about 16048.2169726110. The cubic root of 257545268 is about 636.2354421476.

The spelling of 257545268 in words is "two hundred fifty-seven million, five hundred forty-five thousand, two hundred sixty-eight".