12856438334 has 16 divisors (see below), whose sum is σ = 19740454272. Its totient is φ = 6276397848.

The previous prime is 12856438333. The next prime is 12856438339. The reversal of 12856438334 is 43383465821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12856438333) 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, 218207 + ... + 270789.

It is an arithmetic number, because the mean of its divisors is an integer number (1233778392).

Almost surely, 2^12856438334 is an apocalyptic number.

12856438334 is a deficient number, since it is larger than the sum of its proper divisors (6884015938).

12856438334 is a wasteful number, since it uses less digits than its factorization.

12856438334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55471.

The product of its digits is 1658880, while the sum is 47.

The spelling of 12856438334 in words is "twelve billion, eight hundred fifty-six million, four hundred thirty-eight thousand, three hundred thirty-four".