3993854819956 has 12 divisors (see below), whose sum is σ = 7400378048868. Its totient is φ = 1879461091712.

The previous prime is 3993854819947. The next prime is 3993854819987. The reversal of 3993854819956 is 6599184583993.

3993854819956 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 2 ways, for example, as 1362159757456 + 2631695062500 = 1167116^2 + 1622250^2 .

It is a congruent number.

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, 29366579491 + ... + 29366579626.

It is an arithmetic number, because the mean of its divisors is an integer number (616698170739).

Almost surely, 2^{3993854819956} is an apocalyptic number.

It is an amenable number.

3993854819956 is a deficient number, since it is larger than the sum of its proper divisors (3406523228912).

3993854819956 is a wasteful number, since it uses less digits than its factorization.

3993854819956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58733159138 (or 58733159136 counting only the distinct ones).

The product of its digits is 2267481600, while the sum is 79.

The spelling of 3993854819956 in words is "three trillion, nine hundred ninety-three billion, eight hundred fifty-four million, eight hundred nineteen thousand, nine hundred fifty-six".