3991912124928 has 1280 divisors, whose sum is σ = 14217074049024. Its totient is φ = 966689095680.

The previous prime is 3991912124927. The next prime is 3991912124953. The reversal of 3991912124928 is 8294212191993.

It is not an unprimeable number, because it can be changed into a prime (3991912124927) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 9261976873 + ... + 9261977303.

Almost surely, 2^{3991912124928} 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 3991912124928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7108537024512).

3991912124928 is an abundant number, since it is smaller than the sum of its proper divisors (10225161924096).

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

3991912124928 is a wasteful number, since it uses less digits than its factorization.

3991912124928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605 (or 589 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 60.

The spelling of 3991912124928 in words is "three trillion, nine hundred ninety-one billion, nine hundred twelve million, one hundred twenty-four thousand, nine hundred twenty-eight".