256706618 has 16 divisors (see below), whose sum is σ = 442875264. Its totient is φ = 109315440.

The previous prime is 256706573. The next prime is 256706669. The reversal of 256706618 is 816607652.

256706618 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 56198 + ... + 60593.

It is an arithmetic number, because the mean of its divisors is an integer number (27679704).

Almost surely, 2^256706618 is an apocalyptic number.

256706618 is a deficient number, since it is larger than the sum of its proper divisors (186168646).

256706618 is a wasteful number, since it uses less digits than its factorization.

256706618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116957.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 256706618 is about 16022.0665957922. The cubic root of 256706618 is about 635.5440956312.

The spelling of 256706618 in words is "two hundred fifty-six million, seven hundred six thousand, six hundred eighteen".