13688999999 has 16 divisors (see below), whose sum is σ = 14477598720. Its totient is φ = 12916812480.

The previous prime is 13688999971. The next prime is 13689000019. The reversal of 13688999999 is 99999988631.

It is a Cunningham number, because it is equal to 117000²-1.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13688999999 is a prime.

It is a Duffinian number.

13688999999 is a modest number, since divided by 999999 gives 13688 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13688999959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2688434 + ... + 2693520.

It is an arithmetic number, because the mean of its divisors is an integer number (904849920).

Almost surely, 2^13688999999 is an apocalyptic number.

13688999999 is a deficient number, since it is larger than the sum of its proper divisors (788598721).

13688999999 is a wasteful number, since it uses less digits than its factorization.

13688999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6670.

The product of its digits is 612220032, while the sum is 80.

The spelling of 13688999999 in words is "thirteen billion, six hundred eighty-eight million, nine hundred ninety-nine thousand, nine hundred ninety-nine".