856867199420 has 24 divisors (see below), whose sum is σ = 1799442423744. Its totient is φ = 342742821696.

The previous prime is 856867199413. The next prime is 856867199449. The reversal of 856867199420 is 24991768658.

856867199420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 1940957 + ... + 2341163.

It is an arithmetic number, because the mean of its divisors is an integer number (74976767656).

Almost surely, 2^856867199420 is an apocalyptic number.

It is an amenable number.

856867199420 is an abundant number, since it is smaller than the sum of its proper divisors (942575224324).

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

856867199420 is a wasteful number, since it uses less digits than its factorization.

856867199420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507269 (or 507267 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 65.

The spelling of 856867199420 in words is "eight hundred fifty-six billion, eight hundred sixty-seven million, one hundred ninety-nine thousand, four hundred twenty".