6390009999 has 16 divisors (see below), whose sum is σ = 9470822400. Its totient is φ = 4258143288.

The previous prime is 6390009949. The next prime is 6390010013. The reversal of 6390009999 is 9999000936.

It is not a de Polignac number, because 6390009999 - 2²³ = 6381621391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6390009949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12562 + ... + 113744.

It is an arithmetic number, because the mean of its divisors is an integer number (591926400).

Almost surely, 2^6390009999 is an apocalyptic number.

6390009999 is a deficient number, since it is larger than the sum of its proper divisors (3080812401).

6390009999 is a wasteful number, since it uses less digits than its factorization.

6390009999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103531 (or 103525 counting only the distinct ones).

The product of its (nonzero) digits is 1062882, while the sum is 54.

The square root of 6390009999 is about 79937.5381094514. The cubic root of 6390009999 is about 1855.6689995981.

The spelling of 6390009999 in words is "six billion, three hundred ninety million, nine thousand, nine hundred ninety-nine".