13563311543 has 2 divisors, whose sum is σ = 13563311544. Its totient is φ = 13563311542.

The previous prime is 13563311539. The next prime is 13563311581. The reversal of 13563311543 is 34511336531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13563311543 - 2² = 13563311539 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13563311533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6781655771 + 6781655772.

It is an arithmetic number, because the mean of its divisors is an integer number (6781655772).

Almost surely, 2^13563311543 is an apocalyptic number.

13563311543 is a deficient number, since it is larger than the sum of its proper divisors (1).

13563311543 is an equidigital number, since it uses as much as digits as its factorization.

13563311543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 35.

The spelling of 13563311543 in words is "thirteen billion, five hundred sixty-three million, three hundred eleven thousand, five hundred forty-three".