6405688368 has 60 divisors (see below), whose sum is σ = 17933490328. Its totient is φ = 2134460160.

The previous prime is 6405688361. The next prime is 6405688397. The reversal of 6405688368 is 8638865046.

6405688368 is a `hidden beast` number, since 6 + 40 + 568 + 8 + 36 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (6405688361) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 507996 + ... + 520452.

Almost surely, 2^6405688368 is an apocalyptic number.

It is an amenable number.

6405688368 is an abundant number, since it is smaller than the sum of its proper divisors (11527801960).

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

6405688368 is a wasteful number, since it uses less digits than its factorization.

6405688368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16042 (or 16033 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 54.

The square root of 6405688368 is about 80035.5444037210. The cubic root of 6405688368 is about 1857.1854344209.

The spelling of 6405688368 in words is "six billion, four hundred five million, six hundred eighty-eight thousand, three hundred sixty-eight".