12811655833 has 2 divisors, whose sum is σ = 12811655834. Its totient is φ = 12811655832.

The previous prime is 12811655827. The next prime is 12811655867. The reversal of 12811655833 is 33855611821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9989602704 + 2822053129 = 99948^2 + 53123^2 .

It is an emirp because it is prime and its reverse (33855611821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12811655833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12811655833.

It is not a weakly prime, because it can be changed into another prime (12811655033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6405827916 + 6405827917.

It is an arithmetic number, because the mean of its divisors is an integer number (6405827917).

Almost surely, 2^12811655833 is an apocalyptic number.

It is an amenable number.

12811655833 is a deficient number, since it is larger than the sum of its proper divisors (1).

12811655833 is an equidigital number, since it uses as much as digits as its factorization.

12811655833 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 43.

The spelling of 12811655833 in words is "twelve billion, eight hundred eleven million, six hundred fifty-five thousand, eight hundred thirty-three".