13856964749 has 2 divisors, whose sum is σ = 13856964750. Its totient is φ = 13856964748.

The previous prime is 13856964733. The next prime is 13856964763. The reversal of 13856964749 is 94746965831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7727640649 + 6129324100 = 87907^2 + 78290^2 .

It is a cyclic number.

It is not a de Polignac number, because 13856964749 - 2⁴ = 13856964733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13856964691 and 13856964700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13856964949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6928482374 + 6928482375.

It is an arithmetic number, because the mean of its divisors is an integer number (6928482375).

Almost surely, 2^13856964749 is an apocalyptic number.

It is an amenable number.

13856964749 is a deficient number, since it is larger than the sum of its proper divisors (1).

13856964749 is an equidigital number, since it uses as much as digits as its factorization.

13856964749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39191040, while the sum is 62.

The spelling of 13856964749 in words is "thirteen billion, eight hundred fifty-six million, nine hundred sixty-four thousand, seven hundred forty-nine".