13681986833 has 2 divisors, whose sum is σ = 13681986834. Its totient is φ = 13681986832.

The previous prime is 13681986797. The next prime is 13681986919. The reversal of 13681986833 is 33868918631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8178127489 + 5503859344 = 90433^2 + 74188^2 .

It is a cyclic number.

It is not a de Polignac number, because 13681986833 - 2¹⁸ = 13681724689 is a prime.

It is not a weakly prime, because it can be changed into another prime (13681980833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6840993416 + 6840993417.

It is an arithmetic number, because the mean of its divisors is an integer number (6840993417).

Almost surely, 2^13681986833 is an apocalyptic number.

It is an amenable number.

13681986833 is a deficient number, since it is larger than the sum of its proper divisors (1).

13681986833 is an equidigital number, since it uses as much as digits as its factorization.

13681986833 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4478976, while the sum is 56.

The spelling of 13681986833 in words is "thirteen billion, six hundred eighty-one million, nine hundred eighty-six thousand, eight hundred thirty-three".