6560440505 has 16 divisors (see below), whose sum is σ = 8472274704. Its totient is φ = 4858644480.

The previous prime is 6560440493. The next prime is 6560440531. The reversal of 6560440505 is 5050440656.

It can be written as a sum of positive squares in 8 ways, for example, as 1915200169 + 4645240336 = 43763^2 + 68156^2 .

It is not a de Polignac number, because 6560440505 - 2³⁰ = 5486698681 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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 627452 + ... + 637821.

It is an arithmetic number, because the mean of its divisors is an integer number (529517169).

Almost surely, 2^6560440505 is an apocalyptic number.

It is an amenable number.

6560440505 is a deficient number, since it is larger than the sum of its proper divisors (1911834199).

6560440505 is a wasteful number, since it uses less digits than its factorization.

6560440505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265356.

The product of its (nonzero) digits is 72000, while the sum is 35.

The square root of 6560440505 is about 80996.5462535286. The cubic root of 6560440505 is about 1872.0222249451.

The spelling of 6560440505 in words is "six billion, five hundred sixty million, four hundred forty thousand, five hundred five".