856557822372 has 24 divisors (see below), whose sum is σ = 2284154193216. Its totient is φ = 244730806368.

The previous prime is 856557822371. The next prime is 856557822401. The reversal of 856557822372 is 273228755658.

856557822372 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (856557822371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5098558383 + ... + 5098558550.

It is an arithmetic number, because the mean of its divisors is an integer number (95173091384).

Almost surely, 2^856557822372 is an apocalyptic number.

It is an amenable number.

856557822372 is an abundant number, since it is smaller than the sum of its proper divisors (1427596370844).

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

856557822372 is a wasteful number, since it uses less digits than its factorization.

856557822372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10197116947 (or 10197116945 counting only the distinct ones).

The product of its digits is 56448000, while the sum is 60.

The spelling of 856557822372 in words is "eight hundred fifty-six billion, five hundred fifty-seven million, eight hundred twenty-two thousand, three hundred seventy-two".