13506878899 has 2 divisors, whose sum is σ = 13506878900. Its totient is φ = 13506878898.

The previous prime is 13506878887. The next prime is 13506878921. The reversal of 13506878899 is 99887860531.

13506878899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13506878899 - 2⁵ = 13506878867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13506878899.

It is not a weakly prime, because it can be changed into another prime (13506878849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6753439449 + 6753439450.

It is an arithmetic number, because the mean of its divisors is an integer number (6753439450).

Almost surely, 2^13506878899 is an apocalyptic number.

13506878899 is a deficient number, since it is larger than the sum of its proper divisors (1).

13506878899 is an equidigital number, since it uses as much as digits as its factorization.

13506878899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26127360, while the sum is 64.

The spelling of 13506878899 in words is "thirteen billion, five hundred six million, eight hundred seventy-eight thousand, eight hundred ninety-nine".