856654686456658 has 16 divisors (see below), whose sum is σ = 1293184193039424. Its totient is φ = 425593362888720.

The previous prime is 856654686456557. The next prime is 856654686456661.

856654686456658 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4673091 + ... + 41655097.

It is an arithmetic number, because the mean of its divisors is an integer number (80824012064964).

Almost surely, 2^{856654686456658} is an apocalyptic number.

856654686456658 is a deficient number, since it is larger than the sum of its proper divisors (436529506582766).

856654686456658 is a wasteful number, since it uses less digits than its factorization.

856654686456658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37055937.

The product of its digits is 238878720000, while the sum is 88.

The spelling of 856654686456658 in words is "eight hundred fifty-six trillion, six hundred fifty-four billion, six hundred eighty-six million, four hundred fifty-six thousand, six hundred fifty-eight".