38639986916 has 12 divisors (see below), whose sum is σ = 67696736940. Its totient is φ = 19298062080.

The previous prime is 38639986909. The next prime is 38639986933. The reversal of 38639986916 is 61968993683.

It can be written as a sum of positive squares in 2 ways, for example, as 17760892900 + 20879094016 = 133270^2 + 144496^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5478881 + ... + 5485928.

It is an arithmetic number, because the mean of its divisors is an integer number (5641394745).

Almost surely, 2^38639986916 is an apocalyptic number.

It is an amenable number.

38639986916 is a deficient number, since it is larger than the sum of its proper divisors (29056750024).

38639986916 is a wasteful number, since it uses less digits than its factorization.

38639986916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10965694 (or 10965692 counting only the distinct ones).

The product of its digits is 90699264, while the sum is 68.

The spelling of 38639986916 in words is "thirty-eight billion, six hundred thirty-nine million, nine hundred eighty-six thousand, nine hundred sixteen".