856349727943658 has 64 divisors (see below), whose sum is σ = 1396157094864000. Its totient is φ = 391591563264000.

The previous prime is 856349727943639. The next prime is 856349727943793.

856349727943658 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 856349727943658.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22128452393 + ... + 22128491091.

It is an arithmetic number, because the mean of its divisors is an integer number (21814954607250).

Almost surely, 2^{856349727943658} is an apocalyptic number.

856349727943658 is a deficient number, since it is larger than the sum of its proper divisors (539807366920342).

856349727943658 is a wasteful number, since it uses less digits than its factorization.

856349727943658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56727.

The product of its digits is 65840947200, while the sum is 86.

The spelling of 856349727943658 in words is "eight hundred fifty-six trillion, three hundred forty-nine billion, seven hundred twenty-seven million, nine hundred forty-three thousand, six hundred fifty-eight".