856086822864 has 120 divisors (see below), whose sum is σ = 2948743546112. Its totient is φ = 225781136640.

The previous prime is 856086822847. The next prime is 856086822887. The reversal of 856086822864 is 468228680658.

856086822864 is a `hidden beast` number, since 8 + 560 + 8 + 6 + 8 + 2 + 2 + 8 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32651992 + ... + 32678199.

Almost surely, 2^856086822864 is an apocalyptic number.

856086822864 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

856086822864 is an abundant number, since it is smaller than the sum of its proper divisors (2092656723248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

856086822864 is a wasteful number, since it uses less digits than its factorization.

856086822864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65330225 (or 65330216 counting only the distinct ones).

The product of its (nonzero) digits is 70778880, while the sum is 63.

The spelling of 856086822864 in words is "eight hundred fifty-six billion, eighty-six million, eight hundred twenty-two thousand, eight hundred sixty-four".