12856838544 has 135 divisors (see below), whose sum is σ = 39595778859. Its totient is φ = 3891476160.

The previous prime is 12856838539. The next prime is 12856838573. The reversal of 12856838544 is 44583865821.

The square root of 12856838544 is 113388.

It is a perfect power (a square), and thus also a powerful number.

12856838544 is a `hidden beast` number, since 1 + 2 + 8 + 5 + 68 + 38 + 544 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 14966787 + ... + 14967645.

Almost surely, 2^12856838544 is an apocalyptic number.

12856838544 is the 113388-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12856838544

12856838544 is an abundant number, since it is smaller than the sum of its proper divisors (26738940315).

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

12856838544 is an equidigital number, since it uses as much as digits as its factorization.

12856838544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754 (or 875 counting only the distinct ones).

The product of its digits is 7372800, while the sum is 54.

The spelling of 12856838544 in words is "twelve billion, eight hundred fifty-six million, eight hundred thirty-eight thousand, five hundred forty-four".