12556407827 has 4 divisors (see below), whose sum is σ = 12556636560. Its totient is φ = 12556179096.

The previous prime is 12556407823. The next prime is 12556407833. The reversal of 12556407827 is 72870465521.

12556407827 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.

It is a cyclic number.

It is not a de Polignac number, because 12556407827 - 2² = 12556407823 is a prime.

It is a deceptive number, since it divides R_12556407826.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12556407821) 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, 22874 + ... + 160112.

It is an arithmetic number, because the mean of its divisors is an integer number (3139159140).

Almost surely, 2^12556407827 is an apocalyptic number.

12556407827 is the 91493-rd pentagonal number.

12556407827 is a deficient number, since it is larger than the sum of its proper divisors (228733).

12556407827 is an equidigital number, since it uses as much as digits as its factorization.

12556407827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228732.

The product of its (nonzero) digits is 940800, while the sum is 47.

The spelling of 12556407827 in words is "twelve billion, five hundred fifty-six million, four hundred seven thousand, eight hundred twenty-seven".