12811601687 has 2 divisors, whose sum is σ = 12811601688. Its totient is φ = 12811601686.

The previous prime is 12811601683. The next prime is 12811601707. The reversal of 12811601687 is 78610611821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12811601687 - 2² = 12811601683 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12811601683) 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, 6405800843 + 6405800844.

It is an arithmetic number, because the mean of its divisors is an integer number (6405800844).

Almost surely, 2^12811601687 is an apocalyptic number.

12811601687 is a deficient number, since it is larger than the sum of its proper divisors (1).

12811601687 is an equidigital number, since it uses as much as digits as its factorization.

12811601687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 41.

The spelling of 12811601687 in words is "twelve billion, eight hundred eleven million, six hundred one thousand, six hundred eighty-seven".