13563420569 has 2 divisors, whose sum is σ = 13563420570. Its totient is φ = 13563420568.

The previous prime is 13563420557. The next prime is 13563420587. The reversal of 13563420569 is 96502436531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10426860544 + 3136560025 = 102112^2 + 56005^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13563420569 is a prime.

It is a super-2 number, since 2×13563420569² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13563420589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6781710284 + 6781710285.

It is an arithmetic number, because the mean of its divisors is an integer number (6781710285).

Almost surely, 2^13563420569 is an apocalyptic number.

It is an amenable number.

13563420569 is a deficient number, since it is larger than the sum of its proper divisors (1).

13563420569 is an equidigital number, since it uses as much as digits as its factorization.

13563420569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 583200, while the sum is 44.

The spelling of 13563420569 in words is "thirteen billion, five hundred sixty-three million, four hundred twenty thousand, five hundred sixty-nine".