6399209064 has 32 divisors (see below), whose sum is σ = 16033680000. Its totient is φ = 2128315392.

The previous prime is 6399209057. The next prime is 6399209077. The reversal of 6399209064 is 4609029936.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286144 + ... + 307695.

It is an arithmetic number, because the mean of its divisors is an integer number (501052500).

Almost surely, 2^6399209064 is an apocalyptic number.

It is an amenable number.

6399209064 is an abundant number, since it is smaller than the sum of its proper divisors (9634470936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6399209064 is a wasteful number, since it uses less digits than its factorization.

6399209064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594297 (or 594293 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 48.

The square root of 6399209064 is about 79995.0564972611. The cubic root of 6399209064 is about 1856.5590469670.

The spelling of 6399209064 in words is "six billion, three hundred ninety-nine million, two hundred nine thousand, sixty-four".