3971399911596 has 72 divisors (see below), whose sum is σ = 10852140018720. Its totient is φ = 1217322895104.

The previous prime is 3971399911571. The next prime is 3971399911607. The reversal of 3971399911596 is 6951199931793.

It is a happy number.

3971399911596 is a `hidden beast` number, since 3 + 9 + 7 + 13 + 9 + 9 + 9 + 11 + 596 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16009801 + ... + 16255968.

Almost surely, 2^{3971399911596} is an apocalyptic number.

3971399911596 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3971399911596 is an abundant number, since it is smaller than the sum of its proper divisors (6880740107124).

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

3971399911596 is a wasteful number, since it uses less digits than its factorization.

3971399911596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32266055 (or 32266050 counting only the distinct ones).

The product of its digits is 111602610, while the sum is 72.

The spelling of 3971399911596 in words is "three trillion, nine hundred seventy-one billion, three hundred ninety-nine million, nine hundred eleven thousand, five hundred ninety-six".