3999986204736 has 224 divisors, whose sum is σ = 11390456954880. Its totient is φ = 1236007987200.

The previous prime is 3999986204729. The next prime is 3999986204759. The reversal of 3999986204736 is 6374026899993.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21829981 + ... + 22012451.

Almost surely, 2^{3999986204736} 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 3999986204736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5695228477440).

3999986204736 is an abundant number, since it is smaller than the sum of its proper divisors (7390470750144).

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

3999986204736 is a wasteful number, since it uses less digits than its factorization.

3999986204736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182673 (or 182663 counting only the distinct ones).

The product of its (nonzero) digits is 952342272, while the sum is 75.

The spelling of 3999986204736 in words is "three trillion, nine hundred ninety-nine billion, nine hundred eighty-six million, two hundred four thousand, seven hundred thirty-six".