3996943947824 has 80 divisors (see below), whose sum is σ = 8377416275328. Its totient is φ = 1840160342016.

The previous prime is 3996943947713. The next prime is 3996943947833. The reversal of 3996943947824 is 4287493496993.

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, 32627552 + ... + 32749824.

Almost surely, 2^{3996943947824} is an apocalyptic number.

3996943947824 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3996943947824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4188708137664).

3996943947824 is an abundant number, since it is smaller than the sum of its proper divisors (4380472327504).

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

3996943947824 is a wasteful number, since it uses less digits than its factorization.

3996943947824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124902 (or 124896 counting only the distinct ones).

The product of its digits is 2539579392, while the sum is 77.

The spelling of 3996943947824 in words is "three trillion, nine hundred ninety-six billion, nine hundred forty-three million, nine hundred forty-seven thousand, eight hundred twenty-four".