856642246658 has 16 divisors (see below), whose sum is σ = 1422700287264. Its totient is φ = 383571154560.

The previous prime is 856642246639. The next prime is 856642246709.

It is a happy number.

856642246658 is nontrivially palindromic in base 10.

856642246658 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 856642246658.

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, 290582735 + ... + 290585682.

It is an arithmetic number, because the mean of its divisors is an integer number (88918767954).

Almost surely, 2^856642246658 is an apocalyptic number.

856642246658 is a deficient number, since it is larger than the sum of its proper divisors (566058040606).

856642246658 is a wasteful number, since it uses less digits than its factorization.

856642246658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581168497.

The product of its digits is 132710400, while the sum is 62.

It can be divided in two parts, 8566 and 42246658, that added together give a palindrome (42255224).

The spelling of 856642246658 in words is "eight hundred fifty-six billion, six hundred forty-two million, two hundred forty-six thousand, six hundred fifty-eight".