13509643319 has 2 divisors, whose sum is σ = 13509643320. Its totient is φ = 13509643318.

The previous prime is 13509643313. The next prime is 13509643327. The reversal of 13509643319 is 91334690531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13509643319 - 2²⁴ = 13492866103 is a prime.

It is a super-2 number, since 2×13509643319² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13509643319.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13509643313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6754821659 + 6754821660.

It is an arithmetic number, because the mean of its divisors is an integer number (6754821660).

Almost surely, 2^13509643319 is an apocalyptic number.

13509643319 is a deficient number, since it is larger than the sum of its proper divisors (1).

13509643319 is an equidigital number, since it uses as much as digits as its factorization.

13509643319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 262440, while the sum is 44.

The spelling of 13509643319 in words is "thirteen billion, five hundred nine million, six hundred forty-three thousand, three hundred nineteen".