12811655867 has 2 divisors, whose sum is σ = 12811655868. Its totient is φ = 12811655866.

The previous prime is 12811655833. The next prime is 12811655887. The reversal of 12811655867 is 76855611821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12811655867 - 2¹⁸ = 12811393723 is a prime.

It is not a weakly prime, because it can be changed into another prime (12811655827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6405827933 + 6405827934.

It is an arithmetic number, because the mean of its divisors is an integer number (6405827934).

Almost surely, 2^12811655867 is an apocalyptic number.

12811655867 is a deficient number, since it is larger than the sum of its proper divisors (1).

12811655867 is an equidigital number, since it uses as much as digits as its factorization.

12811655867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 806400, while the sum is 50.

The spelling of 12811655867 in words is "twelve billion, eight hundred eleven million, six hundred fifty-five thousand, eight hundred sixty-seven".