3996015621808 has 80 divisors (see below), whose sum is σ = 9072540677376. Its totient is φ = 1669342913280.

The previous prime is 3996015621797. The next prime is 3996015621817. The reversal of 3996015621808 is 8081265106993.

3996015621808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 1519710 + ... + 3209602.

Almost surely, 2^{3996015621808} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3996015621808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4536270338688).

3996015621808 is an abundant number, since it is smaller than the sum of its proper divisors (5076525055568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3996015621808 is a wasteful number, since it uses less digits than its factorization.

3996015621808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690442 (or 1690436 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 58.

The spelling of 3996015621808 in words is "three trillion, nine hundred ninety-six billion, fifteen million, six hundred twenty-one thousand, eight hundred eight".