12856644107 has 4 divisors (see below), whose sum is σ = 12868301280. Its totient is φ = 12844986936.

The previous prime is 12856644103. The next prime is 12856644127. The reversal of 12856644107 is 70144665821.

12856644107 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70144665821 = 17 ⋅4126156813.

It is a cyclic number.

It is not a de Polignac number, because 12856644107 - 2² = 12856644103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12856644103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5826932 + ... + 5829137.

It is an arithmetic number, because the mean of its divisors is an integer number (3217075320).

Almost surely, 2^12856644107 is an apocalyptic number.

12856644107 is a deficient number, since it is larger than the sum of its proper divisors (11657173).

12856644107 is a wasteful number, since it uses less digits than its factorization.

12856644107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11657172.

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 12856644107 in words is "twelve billion, eight hundred fifty-six million, six hundred forty-four thousand, one hundred seven".