13503640639 has 2 divisors, whose sum is σ = 13503640640. Its totient is φ = 13503640638.

The previous prime is 13503640637. The next prime is 13503640673. The reversal of 13503640639 is 93604630531.

13503640639 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 13503640639 - 2¹ = 13503640637 is a prime.

Together with 13503640637, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13503640637) 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, 6751820319 + 6751820320.

It is an arithmetic number, because the mean of its divisors is an integer number (6751820320).

Almost surely, 2^13503640639 is an apocalyptic number.

13503640639 is a deficient number, since it is larger than the sum of its proper divisors (1).

13503640639 is an equidigital number, since it uses as much as digits as its factorization.

13503640639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 40.

The spelling of 13503640639 in words is "thirteen billion, five hundred three million, six hundred forty thousand, six hundred thirty-nine".