256616063 has 4 divisors (see below), whose sum is σ = 279944808. Its totient is φ = 233287320.

The previous prime is 256616023. The next prime is 256616093. The reversal of 256616063 is 360616652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 256616063 - 2⁶ = 256615999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256616023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11664356 + ... + 11664377.

It is an arithmetic number, because the mean of its divisors is an integer number (69986202).

Almost surely, 2^256616063 is an apocalyptic number.

256616063 is a deficient number, since it is larger than the sum of its proper divisors (23328745).

256616063 is a wasteful number, since it uses less digits than its factorization.

256616063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23328744.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 256616063 is about 16019.2404002187. The cubic root of 256616063 is about 635.4693560126.

The spelling of 256616063 in words is "two hundred fifty-six million, six hundred sixteen thousand, sixty-three".