3989844545568 has 192 divisors, whose sum is σ = 12136063500288. Its totient is φ = 1124203207680.

The previous prime is 3989844545539. The next prime is 3989844545573. The reversal of 3989844545568 is 8655454489893.

It is a junction number, because it is equal to n+sod(n) for n = 3989844545493 and 3989844545502.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14112478 + ... + 14392418.

It is an arithmetic number, because the mean of its divisors is an integer number (63208664064).

Almost surely, 2^{3989844545568} 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 3989844545568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6068031750144).

3989844545568 is an abundant number, since it is smaller than the sum of its proper divisors (8146218954720).

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

3989844545568 is a wasteful number, since it uses less digits than its factorization.

3989844545568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280255 (or 280247 counting only the distinct ones).

The product of its digits is 5971968000, while the sum is 78.

The spelling of 3989844545568 in words is "three trillion, nine hundred eighty-nine billion, eight hundred forty-four million, five hundred forty-five thousand, five hundred sixty-eight".