13208661533 has 2 divisors, whose sum is σ = 13208661534. Its totient is φ = 13208661532.

The previous prime is 13208661517. The next prime is 13208661569. The reversal of 13208661533 is 33516680231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10023413689 + 3185247844 = 100117^2 + 56438^2 .

It is an emirp because it is prime and its reverse (33516680231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13208661533 - 2⁴ = 13208661517 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13208664533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6604330766 + 6604330767.

It is an arithmetic number, because the mean of its divisors is an integer number (6604330767).

Almost surely, 2^13208661533 is an apocalyptic number.

It is an amenable number.

13208661533 is a deficient number, since it is larger than the sum of its proper divisors (1).

13208661533 is an equidigital number, since it uses as much as digits as its factorization.

13208661533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 13208661533 in words is "thirteen billion, two hundred eight million, six hundred sixty-one thousand, five hundred thirty-three".