256995616 has 24 divisors (see below), whose sum is σ = 506322684. Its totient is φ = 128405760.

The previous prime is 256995601. The next prime is 256995643. The reversal of 256995616 is 616599652.

It can be written as a sum of positive squares in 2 ways, for example, as 256640400 + 355216 = 16020^2 + 596^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 256995616.

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, 74506 + ... + 77878.

Almost surely, 2^256995616 is an apocalyptic number.

It is an amenable number.

256995616 is a deficient number, since it is larger than the sum of its proper divisors (249327068).

256995616 is a wasteful number, since it uses less digits than its factorization.

256995616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5764 (or 5756 counting only the distinct ones).

The product of its digits is 874800, while the sum is 49.

The square root of 256995616 is about 16031.0828080950. The cubic root of 256995616 is about 635.7825027955.

The spelling of 256995616 in words is "two hundred fifty-six million, nine hundred ninety-five thousand, six hundred sixteen".