6559999556 has 48 divisors (see below), whose sum is σ = 13098153600. Its totient is φ = 2845624320.

The previous prime is 6559999553. The next prime is 6559999571.

It is a happy number.

6559999556 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (6559999553) 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, 447170 + ... + 461606.

It is an arithmetic number, because the mean of its divisors is an integer number (272878200).

Almost surely, 2^6559999556 is an apocalyptic number.

It is an amenable number.

6559999556 is a deficient number, since it is larger than the sum of its proper divisors (6538154044).

6559999556 is a wasteful number, since it uses less digits than its factorization.

6559999556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14924 (or 14922 counting only the distinct ones).

The product of its digits is 147622500, while the sum is 68.

The square root of 6559999556 is about 80993.8241843167. The cubic root of 6559999556 is about 1871.9802823945.

The spelling of 6559999556 in words is "six billion, five hundred fifty-nine million, nine hundred ninety-nine thousand, five hundred fifty-six".