12811419889 has 2 divisors, whose sum is σ = 12811419890. Its totient is φ = 12811419888.

The previous prime is 12811419833. The next prime is 12811419923. The reversal of 12811419889 is 98891411821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7206651664 + 5604768225 = 84892^2 + 74865^2 .

It is a cyclic number.

It is not a de Polignac number, because 12811419889 - 2¹⁷ = 12811288817 is a prime.

It is not a weakly prime, because it can be changed into another prime (12811416889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6405709944 + 6405709945.

It is an arithmetic number, because the mean of its divisors is an integer number (6405709945).

Almost surely, 2^12811419889 is an apocalyptic number.

It is an amenable number.

12811419889 is a deficient number, since it is larger than the sum of its proper divisors (1).

12811419889 is an equidigital number, since it uses as much as digits as its factorization.

12811419889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 52.

The spelling of 12811419889 in words is "twelve billion, eight hundred eleven million, four hundred nineteen thousand, eight hundred eighty-nine".