3999999999989 has 24 divisors (see below), whose sum is σ = 4745456316288. Its totient is φ = 3360616415520.

The previous prime is 3999999999967. The next prime is 4000000000039. The reversal of 3999999999989 is 9899999999993.

It is a happy number.

It is not a de Polignac number, because 3999999999989 - 2²⁰ = 3999998951413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3999999999989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999999999929) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1930544 + ... + 3424470.

It is an arithmetic number, because the mean of its divisors is an integer number (197727346512).

Almost surely, 2^{3999999999989} is an apocalyptic number.

It is an amenable number.

3999999999989 is a deficient number, since it is larger than the sum of its proper divisors (745456316299).

3999999999989 is a wasteful number, since it uses less digits than its factorization.

3999999999989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495025 (or 1495018 counting only the distinct ones).

The product of its digits is 753145430616, while the sum is 110.

The spelling of 3999999999989 in words is "three trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred eighty-nine".