6399037799 has 16 divisors (see below), whose sum is σ = 8108814336. Its totient is φ = 4904517600.

The previous prime is 6399037793. The next prime is 6399037807. The reversal of 6399037799 is 9977309936.

It is a cyclic number.

It is not a de Polignac number, because 6399037799 - 2⁴ = 6399037783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6399037793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 676487 + ... + 685880.

It is an arithmetic number, because the mean of its divisors is an integer number (506800896).

Almost surely, 2^6399037799 is an apocalyptic number.

6399037799 is a deficient number, since it is larger than the sum of its proper divisors (1709776537).

6399037799 is a wasteful number, since it uses less digits than its factorization.

6399037799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362446.

The product of its (nonzero) digits is 17360406, while the sum is 62.

The square root of 6399037799 is about 79993.9860177001. The cubic root of 6399037799 is about 1856.5424841690.

The spelling of 6399037799 in words is "six billion, three hundred ninety-nine million, thirty-seven thousand, seven hundred ninety-nine".