12180628891 has 2 divisors, whose sum is σ = 12180628892. Its totient is φ = 12180628890.

The previous prime is 12180628861. The next prime is 12180628909. The reversal of 12180628891 is 19882608121.

It is a happy number.

12180628891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12180628891 - 2¹⁵ = 12180596123 is a prime.

It is not a weakly prime, because it can be changed into another prime (12180628861) 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 as a sum of consecutive naturals, namely, 6090314445 + 6090314446.

It is an arithmetic number, because the mean of its divisors is an integer number (6090314446).

Almost surely, 2^12180628891 is an apocalyptic number.

12180628891 is a deficient number, since it is larger than the sum of its proper divisors (1).

12180628891 is an equidigital number, since it uses as much as digits as its factorization.

12180628891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 46.

The spelling of 12180628891 in words is "twelve billion, one hundred eighty million, six hundred twenty-eight thousand, eight hundred ninety-one".