13728158109 has 6 divisors (see below), whose sum is σ = 19829561726. Its totient is φ = 9152105400.

The previous prime is 13728158099. The next prime is 13728158123. The reversal of 13728158109 is 90185182731.

It can be written as a sum of positive squares in only one way, i.e., 13430492100 + 297666009 = 115890^2 + 17253^2 .

It is not a de Polignac number, because 13728158109 - 2⁵ = 13728158077 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 (13728158149) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 762675442 + ... + 762675459.

Almost surely, 2^13728158109 is an apocalyptic number.

It is an amenable number.

13728158109 is a deficient number, since it is larger than the sum of its proper divisors (6101403617).

13728158109 is a wasteful number, since it uses less digits than its factorization.

13728158109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525350907 (or 1525350904 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The spelling of 13728158109 in words is "thirteen billion, seven hundred twenty-eight million, one hundred fifty-eight thousand, one hundred nine".