3613721438845 has 16 divisors (see below), whose sum is σ = 4956049974528. Its totient is φ = 2477935843200.

The previous prime is 3613721438801. The next prime is 3613721438863. The reversal of 3613721438845 is 5488341273163.

3613721438845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3613721438845 - 2³⁵ = 3579361700477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1107945 + ... + 2907745.

It is an arithmetic number, because the mean of its divisors is an integer number (309753123408).

Almost surely, 2^{3613721438845} is an apocalyptic number.

3613721438845 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3613721438845 is a deficient number, since it is larger than the sum of its proper divisors (1342328535683).

3613721438845 is a wasteful number, since it uses less digits than its factorization.

3613721438845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857180.

The product of its digits is 11612160, while the sum is 55.

The spelling of 3613721438845 in words is "three trillion, six hundred thirteen billion, seven hundred twenty-one million, four hundred thirty-eight thousand, eight hundred forty-five".