13638239999 has 4 divisors (see below), whose sum is σ = 13895565336. Its totient is φ = 13380914664.

The previous prime is 13638239983. The next prime is 13638240001. The reversal of 13638239999 is 99993283631.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13638239999 - 2⁴ = 13638239983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13638239969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128662589 + ... + 128662694.

It is an arithmetic number, because the mean of its divisors is an integer number (3473891334).

Almost surely, 2^13638239999 is an apocalyptic number.

13638239999 is a deficient number, since it is larger than the sum of its proper divisors (257325337).

13638239999 is an equidigital number, since it uses as much as digits as its factorization.

13638239999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257325336.

The product of its digits is 17006112, while the sum is 62.

The spelling of 13638239999 in words is "thirteen billion, six hundred thirty-eight million, two hundred thirty-nine thousand, nine hundred ninety-nine".