3991030541824 has 80 divisors (see below), whose sum is σ = 8233809002496. Its totient is φ = 1930602240000.

The previous prime is 3991030541789. The next prime is 3991030541831. The reversal of 3991030541824 is 4281450301993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59756449 + ... + 59823199.

Almost surely, 2^{3991030541824} 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 3991030541824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4116904501248).

3991030541824 is an abundant number, since it is smaller than the sum of its proper divisors (4242778460672).

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

3991030541824 is an equidigital number, since it uses as much as digits as its factorization.

3991030541824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70567 (or 70551 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 49.

The spelling of 3991030541824 in words is "three trillion, nine hundred ninety-one billion, thirty million, five hundred forty-one thousand, eight hundred twenty-four".