6560386561 has 4 divisors (see below), whose sum is σ = 6587608324. Its totient is φ = 6533164800.

The previous prime is 6560386559. The next prime is 6560386607. The reversal of 6560386561 is 1656830656.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5620350961 + 940035600 = 74969^2 + 30660^2 .

It is a cyclic number.

It is not a de Polignac number, because 6560386561 - 2¹ = 6560386559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6560386541) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 13610520 + ... + 13611001.

It is an arithmetic number, because the mean of its divisors is an integer number (1646902081).

Almost surely, 2^6560386561 is an apocalyptic number.

It is an amenable number.

6560386561 is a deficient number, since it is larger than the sum of its proper divisors (27221763).

6560386561 is a wasteful number, since it uses less digits than its factorization.

6560386561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27221762.

The product of its (nonzero) digits is 777600, while the sum is 46.

The square root of 6560386561 is about 80996.2132509909. The cubic root of 6560386561 is about 1872.0170939561.

The spelling of 6560386561 in words is "six billion, five hundred sixty million, three hundred eighty-six thousand, five hundred sixty-one".