6399119999 has 4 divisors (see below), whose sum is σ = 6507579720. Its totient is φ = 6290660280.

The previous prime is 6399119981. The next prime is 6399120011. The reversal of 6399119999 is 9999119936.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6399119999 - 2²⁴ = 6382342783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6399119929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54229772 + ... + 54229889.

It is an arithmetic number, because the mean of its divisors is an integer number (1626894930).

Almost surely, 2^6399119999 is an apocalyptic number.

6399119999 is a deficient number, since it is larger than the sum of its proper divisors (108459721).

6399119999 is a wasteful number, since it uses less digits than its factorization.

6399119999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108459720.

The product of its digits is 9565938, while the sum is 65.

The square root of 6399119999 is about 79994.4998046741. The cubic root of 6399119999 is about 1856.5504336526.

The spelling of 6399119999 in words is "six billion, three hundred ninety-nine million, one hundred nineteen thousand, nine hundred ninety-nine".