13838138536 has 8 divisors (see below), whose sum is σ = 25946509770. Its totient is φ = 6919069264.

The previous prime is 13838138497. The next prime is 13838138551. The reversal of 13838138536 is 63583183831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12301028100 + 1537110436 = 110910^2 + 39206^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 13838138536.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 864883651 + ... + 864883666.

Almost surely, 2^13838138536 is an apocalyptic number.

It is an amenable number.

13838138536 is a deficient number, since it is larger than the sum of its proper divisors (12108371234).

13838138536 is a wasteful number, since it uses less digits than its factorization.

13838138536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729767323 (or 1729767319 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 49.

The spelling of 13838138536 in words is "thirteen billion, eight hundred thirty-eight million, one hundred thirty-eight thousand, five hundred thirty-six".