3899573931956 has 12 divisors (see below), whose sum is σ = 6990699610020. Its totient is φ = 1902231186240.

The previous prime is 3899573931947. The next prime is 3899573932013. The reversal of 3899573931956 is 6591393759983.

It can be written as a sum of positive squares in 2 ways, for example, as 952412039056 + 2947161892900 = 975916^2 + 1716730^2 .

It is a hoax number, since the sum of its digits (77) coincides with the sum of the digits of its distinct prime factors.

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, 11888944751 + ... + 11888945078.

It is an arithmetic number, because the mean of its divisors is an integer number (582558300835).

Almost surely, 2^{3899573931956} is an apocalyptic number.

It is an amenable number.

3899573931956 is a deficient number, since it is larger than the sum of its proper divisors (3091125678064).

3899573931956 is a wasteful number, since it uses less digits than its factorization.

3899573931956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23777889874 (or 23777889872 counting only the distinct ones).

The product of its digits is 1488034800, while the sum is 77.

The spelling of 3899573931956 in words is "three trillion, eight hundred ninety-nine billion, five hundred seventy-three million, nine hundred thirty-one thousand, nine hundred fifty-six".