856684861412 has 12 divisors (see below), whose sum is σ = 1503052490940. Its totient is φ = 427241292576.

The previous prime is 856684861391. The next prime is 856684861421. The reversal of 856684861412 is 214168486658.

It can be written as a sum of positive squares in 2 ways, for example, as 282945269476 + 573739591936 = 531926^2 + 757456^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275282783 + ... + 275285894.

It is an arithmetic number, because the mean of its divisors is an integer number (125254374245).

Almost surely, 2^856684861412 is an apocalyptic number.

It is an amenable number.

856684861412 is a deficient number, since it is larger than the sum of its proper divisors (646367629528).

856684861412 is a wasteful number, since it uses less digits than its factorization.

856684861412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550569070 (or 550569068 counting only the distinct ones).

The product of its digits is 17694720, while the sum is 59.

The spelling of 856684861412 in words is "eight hundred fifty-six billion, six hundred eighty-four million, eight hundred sixty-one thousand, four hundred twelve".