13639679999 has 16 divisors (see below), whose sum is σ = 15120380160. Its totient is φ = 12199824000.

The previous prime is 13639679953. The next prime is 13639680053. The reversal of 13639679999 is 99997693631.

It is a cyclic number.

It is not a de Polignac number, because 13639679999 - 2²⁸ = 13371244543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (71).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13639679299) 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, 365687 + ... + 401255.

It is an arithmetic number, because the mean of its divisors is an integer number (945023760).

Almost surely, 2^13639679999 is an apocalyptic number.

13639679999 is a deficient number, since it is larger than the sum of its proper divisors (1480700161).

13639679999 is a wasteful number, since it uses less digits than its factorization.

13639679999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36142.

The product of its digits is 133923132, while the sum is 71.

The spelling of 13639679999 in words is "thirteen billion, six hundred thirty-nine million, six hundred seventy-nine thousand, nine hundred ninety-nine".