13844968681 has 2 divisors, whose sum is σ = 13844968682. Its totient is φ = 13844968680.

The previous prime is 13844968679. The next prime is 13844968721. The reversal of 13844968681 is 18686944831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13708663056 + 136305625 = 117084^2 + 11675^2 .

It is a cyclic number.

It is not a de Polignac number, because 13844968681 - 2¹ = 13844968679 is a prime.

It is a super-2 number, since 2×13844968681² (a number of 21 digits) contains 22 as substring.

Together with 13844968679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13844968651) 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, 6922484340 + 6922484341.

It is an arithmetic number, because the mean of its divisors is an integer number (6922484341).

Almost surely, 2^13844968681 is an apocalyptic number.

It is an amenable number.

13844968681 is a deficient number, since it is larger than the sum of its proper divisors (1).

13844968681 is an equidigital number, since it uses as much as digits as its factorization.

13844968681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7962624, while the sum is 58.

The spelling of 13844968681 in words is "thirteen billion, eight hundred forty-four million, nine hundred sixty-eight thousand, six hundred eighty-one".