3981537968 has 40 divisors (see below), whose sum is σ = 7897562976. Its totient is φ = 1944000000.

The previous prime is 3981537943. The next prime is 3981538013. The reversal of 3981537968 is 8697351893.

3981537968 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 7 ways as a sum of consecutive naturals, for example, 101093 + ... + 134843.

Almost surely, 2^3981537968 is an apocalyptic number.

It is an amenable number.

3981537968 is a deficient number, since it is larger than the sum of its proper divisors (3916025008).

3981537968 is a wasteful number, since it uses less digits than its factorization.

3981537968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33933 (or 33927 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 59.

The square root of 3981537968 is about 63099.4292208733. The cubic root of 3981537968 is about 1584.9550641893.

The spelling of 3981537968 in words is "three billion, nine hundred eighty-one million, five hundred thirty-seven thousand, nine hundred sixty-eight".