6560505985 has 32 divisors (see below), whose sum is σ = 8770228992. Its totient is φ = 4671175680.

The previous prime is 6560505977. The next prime is 6560505997. The reversal of 6560505985 is 5895050656.

6560505985 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6560505985 - 2³ = 6560505977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 544092 + ... + 556018.

It is an arithmetic number, because the mean of its divisors is an integer number (274069656).

Almost surely, 2^6560505985 is an apocalyptic number.

It is an amenable number.

6560505985 is a deficient number, since it is larger than the sum of its proper divisors (2209723007).

6560505985 is a wasteful number, since it uses less digits than its factorization.

6560505985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12153.

The product of its (nonzero) digits is 1620000, while the sum is 49.

The square root of 6560505985 is about 80996.9504672861. The cubic root of 6560505985 is about 1872.0284531655.

The spelling of 6560505985 in words is "six billion, five hundred sixty million, five hundred five thousand, nine hundred eighty-five".