6518391068 has 24 divisors (see below), whose sum is σ = 13354754784. Its totient is φ = 2725459200.

The previous prime is 6518391067. The next prime is 6518391119. The reversal of 6518391068 is 8601938156.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6518391067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2837873 + ... + 2840168.

It is an arithmetic number, because the mean of its divisors is an integer number (556448116).

Almost surely, 2^6518391068 is an apocalyptic number.

It is an amenable number.

6518391068 is an abundant number, since it is smaller than the sum of its proper divisors (6836363716).

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

6518391068 is a wasteful number, since it uses less digits than its factorization.

6518391068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5678093 (or 5678091 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 6518391068 is about 80736.5534810596. The cubic root of 6518391068 is about 1868.0140457656.

The spelling of 6518391068 in words is "six billion, five hundred eighteen million, three hundred ninety-one thousand, sixty-eight".