3838703805521 has 4 divisors (see below), whose sum is σ = 4133988713652. Its totient is φ = 3543418897392.

The previous prime is 3838703805487. The next prime is 3838703805523. The reversal of 3838703805521 is 1255083078383.

3838703805521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1639652079121 + 2199051726400 = 1280489^2 + 1482920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3838703805521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3838703805523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147642454046 + ... + 147642454071.

It is an arithmetic number, because the mean of its divisors is an integer number (1033497178413).

Almost surely, 2^{3838703805521} is an apocalyptic number.

It is an amenable number.

3838703805521 is a deficient number, since it is larger than the sum of its proper divisors (295284908131).

3838703805521 is a wasteful number, since it uses less digits than its factorization.

3838703805521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295284908130.

The product of its (nonzero) digits is 4838400, while the sum is 53.

The spelling of 3838703805521 in words is "three trillion, eight hundred thirty-eight billion, seven hundred three million, eight hundred five thousand, five hundred twenty-one".