12156886837 has 2 divisors, whose sum is σ = 12156886838. Its totient is φ = 12156886836.

The previous prime is 12156886829. The next prime is 12156886867. The reversal of 12156886837 is 73868865121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11939058756 + 217828081 = 109266^2 + 14759^2 .

It is a cyclic number.

It is not a de Polignac number, because 12156886837 - 2³ = 12156886829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12156886817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6078443418 + 6078443419.

It is an arithmetic number, because the mean of its divisors is an integer number (6078443419).

Almost surely, 2^12156886837 is an apocalyptic number.

It is an amenable number.

12156886837 is a deficient number, since it is larger than the sum of its proper divisors (1).

12156886837 is an equidigital number, since it uses as much as digits as its factorization.

12156886837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3870720, while the sum is 55.

The spelling of 12156886837 in words is "twelve billion, one hundred fifty-six million, eight hundred eighty-six thousand, eight hundred thirty-seven".