11565560560109 has 2 divisors, whose sum is σ = 11565560560110. Its totient is φ = 11565560560108.

The previous prime is 11565560560069. The next prime is 11565560560199. The reversal of 11565560560109 is 90106506556511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10996373302084 + 569187258025 = 3316078^2 + 754445^2 .

It is a cyclic number.

It is not a de Polignac number, because 11565560560109 - 2²⁸ = 11565292124653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11565560560199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5782780280054 + 5782780280055.

It is an arithmetic number, because the mean of its divisors is an integer number (5782780280055).

Almost surely, 2^{11565560560109} is an apocalyptic number.

It is an amenable number.

11565560560109 is a deficient number, since it is larger than the sum of its proper divisors (1).

11565560560109 is an equidigital number, since it uses as much as digits as its factorization.

11565560560109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1215000, while the sum is 50.

The spelling of 11565560560109 in words is "eleven trillion, five hundred sixty-five billion, five hundred sixty million, five hundred sixty thousand, one hundred nine".