6399395896 has 16 divisors (see below), whose sum is σ = 12412621800. Its totient is φ = 3089363424.

The previous prime is 6399395887. The next prime is 6399395911. The reversal of 6399395896 is 6985939936.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13791570 + ... + 13792033.

Almost surely, 2^6399395896 is an apocalyptic number.

It is an amenable number.

6399395896 is a deficient number, since it is larger than the sum of its proper divisors (6013225904).

6399395896 is a wasteful number, since it uses less digits than its factorization.

6399395896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27583638 (or 27583634 counting only the distinct ones).

The product of its digits is 85030560, while the sum is 67.

The square root of 6399395896 is about 79996.2242608987. The cubic root of 6399395896 is about 1856.5771148907.

The spelling of 6399395896 in words is "six billion, three hundred ninety-nine million, three hundred ninety-five thousand, eight hundred ninety-six".