856705018 has 16 divisors (see below), whose sum is σ = 1385034336. Its totient is φ = 395080560.

The previous prime is 856704991. The next prime is 856705027. The reversal of 856705018 is 810507658.

856705018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20805 + ... + 46327.

It is an arithmetic number, because the mean of its divisors is an integer number (86564646).

Almost surely, 2^856705018 is an apocalyptic number.

856705018 is a deficient number, since it is larger than the sum of its proper divisors (528329318).

856705018 is a wasteful number, since it uses less digits than its factorization.

856705018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26829.

The product of its (nonzero) digits is 67200, while the sum is 40.

The square root of 856705018 is about 29269.5237064083. The cubic root of 856705018 is about 949.7524814067.

The spelling of 856705018 in words is "eight hundred fifty-six million, seven hundred five thousand, eighteen".