3992405647868 has 12 divisors (see below), whose sum is σ = 7621865327832. Its totient is φ = 1814729839920.

The previous prime is 3992405647843. The next prime is 3992405647897. The reversal of 3992405647868 is 8687465042993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45368245955 + ... + 45368246042.

It is an arithmetic number, because the mean of its divisors is an integer number (635155443986).

Almost surely, 2^{3992405647868} is an apocalyptic number.

It is an amenable number.

3992405647868 is a deficient number, since it is larger than the sum of its proper divisors (3629459679964).

3992405647868 is a wasteful number, since it uses less digits than its factorization.

3992405647868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90736492012 (or 90736492010 counting only the distinct ones).

The product of its (nonzero) digits is 627056640, while the sum is 71.

The spelling of 3992405647868 in words is "three trillion, nine hundred ninety-two billion, four hundred five million, six hundred forty-seven thousand, eight hundred sixty-eight".