856317854188 has 12 divisors (see below), whose sum is σ = 1504826356320. Its totient is φ = 426367466672.

The previous prime is 856317854159. The next prime is 856317854239. The reversal of 856317854188 is 881458713658.

It is a super-2 number, since 2×856317854188² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 447864031 + ... + 447865942.

It is an arithmetic number, because the mean of its divisors is an integer number (125402196360).

Almost surely, 2^856317854188 is an apocalyptic number.

It is an amenable number.

856317854188 is a deficient number, since it is larger than the sum of its proper divisors (648508502132).

856317854188 is a wasteful number, since it uses less digits than its factorization.

856317854188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895730216 (or 895730214 counting only the distinct ones).

The product of its digits is 51609600, while the sum is 64.

The spelling of 856317854188 in words is "eight hundred fifty-six billion, three hundred seventeen million, eight hundred fifty-four thousand, one hundred eighty-eight".