12109645837 has 2 divisors, whose sum is σ = 12109645838. Its totient is φ = 12109645836.

The previous prime is 12109645829. The next prime is 12109645871. The reversal of 12109645837 is 73854690121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12067901316 + 41744521 = 109854^2 + 6461^2 .

It is an emirp because it is prime and its reverse (73854690121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12109645837 - 2³ = 12109645829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12109645237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6054822918 + 6054822919.

It is an arithmetic number, because the mean of its divisors is an integer number (6054822919).

It is a 1-persistent number, because it is pandigital, but 2⋅12109645837 = 24219291674 is not.

Almost surely, 2^12109645837 is an apocalyptic number.

It is an amenable number.

12109645837 is a deficient number, since it is larger than the sum of its proper divisors (1).

12109645837 is an equidigital number, since it uses as much as digits as its factorization.

12109645837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 12109645837 in words is "twelve billion, one hundred nine million, six hundred forty-five thousand, eight hundred thirty-seven".