13508818399 has 2 divisors, whose sum is σ = 13508818400. Its totient is φ = 13508818398.

The previous prime is 13508818391. The next prime is 13508818441. The reversal of 13508818399 is 99381880531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13508818399 - 2³ = 13508818391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13508818391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6754409199 + 6754409200.

It is an arithmetic number, because the mean of its divisors is an integer number (6754409200).

Almost surely, 2^13508818399 is an apocalyptic number.

13508818399 is a deficient number, since it is larger than the sum of its proper divisors (1).

13508818399 is an equidigital number, since it uses as much as digits as its factorization.

13508818399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 55.

The spelling of 13508818399 in words is "thirteen billion, five hundred eight million, eight hundred eighteen thousand, three hundred ninety-nine".