13564666243 has 2 divisors, whose sum is σ = 13564666244. Its totient is φ = 13564666242.

The previous prime is 13564666229. The next prime is 13564666259. The reversal of 13564666243 is 34266646531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13564666243 - 2⁹ = 13564665731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13564666193 and 13564666202.

It is not a weakly prime, because it can be changed into another prime (13564666273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6782333121 + 6782333122.

It is an arithmetic number, because the mean of its divisors is an integer number (6782333122).

Almost surely, 2^13564666243 is an apocalyptic number.

13564666243 is a deficient number, since it is larger than the sum of its proper divisors (1).

13564666243 is an equidigital number, since it uses as much as digits as its factorization.

13564666243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 46.

The spelling of 13564666243 in words is "thirteen billion, five hundred sixty-four million, six hundred sixty-six thousand, two hundred forty-three".