256257616 has 20 divisors (see below), whose sum is σ = 496833652. Its totient is φ = 128042496.

The previous prime is 256257613. The next prime is 256257629. The reversal of 256257616 is 616752652.

It can be written as a sum of positive squares in 2 ways, for example, as 124099600 + 132158016 = 11140^2 + 11496^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256257613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23926 + ... + 32938.

Almost surely, 2^256257616 is an apocalyptic number.

It is an amenable number.

256257616 is a deficient number, since it is larger than the sum of its proper divisors (240576036).

256257616 is a wasteful number, since it uses less digits than its factorization.

256257616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10798 (or 10792 counting only the distinct ones).

The product of its digits is 151200, while the sum is 40.

The square root of 256257616 is about 16008.0484756887. The cubic root of 256257616 is about 635.1733389187.

The spelling of 256257616 in words is "two hundred fifty-six million, two hundred fifty-seven thousand, six hundred sixteen".