3938613344836 has 27 divisors (see below), whose sum is σ = 6911916655287. Its totient is φ = 1963795454880.

The previous prime is 3938613344821. The next prime is 3938613344843. The reversal of 3938613344836 is 6384433168393.

The square root of 3938613344836 is 1984594.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 3001868108100 + 936745236736 = 1732590^2 + 967856^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1671026970 + ... + 1671029326.

Almost surely, 2^{3938613344836} is an apocalyptic number.

3938613344836 is the 1984594-th square number.

It is an amenable number.

3938613344836 is a deficient number, since it is larger than the sum of its proper divisors (2973303310451).

3938613344836 is an frugal number, since it uses more digits than its factorization.

3938613344836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5560 (or 2780 counting only the distinct ones).

The product of its digits is 80621568, while the sum is 61.

The spelling of 3938613344836 in words is "three trillion, nine hundred thirty-eight billion, six hundred thirteen million, three hundred forty-four thousand, eight hundred thirty-six".