6399004365899 has 2 divisors, whose sum is σ = 6399004365900. Its totient is φ = 6399004365898.

The previous prime is 6399004365889. The next prime is 6399004365913. The reversal of 6399004365899 is 9985634009936.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6399004365899 - 2¹² = 6399004361803 is a prime.

It is not a weakly prime, because it can be changed into another prime (6399004365839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3199502182949 + 3199502182950.

It is an arithmetic number, because the mean of its divisors is an integer number (3199502182950).

Almost surely, 2^{6399004365899} is an apocalyptic number.

6399004365899 is a deficient number, since it is larger than the sum of its proper divisors (1).

6399004365899 is an equidigital number, since it uses as much as digits as its factorization.

6399004365899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 340122240, while the sum is 71.

The spelling of 6399004365899 in words is "six trillion, three hundred ninety-nine billion, four million, three hundred sixty-five thousand, eight hundred ninety-nine".