256657441017424 has 40 divisors (see below), whose sum is σ = 507858310309248. Its totient is φ = 125597277335040.

The previous prime is 256657441017391. The next prime is 256657441017427. The reversal of 256657441017424 is 424710144756652.

It is a super-2 number, since 2×256657441017424² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256657441017427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93227539 + ... + 95941069.

Almost surely, 2^{256657441017424} is an apocalyptic number.

It is an amenable number.

256657441017424 is a deficient number, since it is larger than the sum of its proper divisors (251200869291824).

256657441017424 is a wasteful number, since it uses less digits than its factorization.

256657441017424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2839363 (or 2839357 counting only the distinct ones).

The product of its (nonzero) digits is 45158400, while the sum is 58.

The spelling of 256657441017424 in words is "two hundred fifty-six trillion, six hundred fifty-seven billion, four hundred forty-one million, seventeen thousand, four hundred twenty-four".