3813685613956 has 27 divisors (see below), whose sum is σ = 6734313339663. Its totient is φ = 1889749370880.

The previous prime is 3813685613939. The next prime is 3813685613963. The reversal of 3813685613956 is 6593165863183.

The square root of 3813685613956 is 1952866.

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

3813685613956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3479157562500 + 334528051456 = 1865250^2 + 578384^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 441343396 + ... + 441352036.

Almost surely, 2^{3813685613956} is an apocalyptic number.

3813685613956 is the 1952866-th square number.

It is an amenable number.

3813685613956 is a deficient number, since it is larger than the sum of its proper divisors (2920627725707).

3813685613956 is an frugal number, since it uses more digits than its factorization.

3813685613956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17512 (or 8756 counting only the distinct ones).

The product of its digits is 83980800, while the sum is 64.

Multiplying 3813685613956 by its sum of digits (64), we get a square (244075879293184 = 15622928²).

The spelling of 3813685613956 in words is "three trillion, eight hundred thirteen billion, six hundred eighty-five million, six hundred thirteen thousand, nine hundred fifty-six".