11565942361 has 2 divisors, whose sum is σ = 11565942362. Its totient is φ = 11565942360.

The previous prime is 11565942341. The next prime is 11565942373. The reversal of 11565942361 is 16324956511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6445681225 + 5120261136 = 80285^2 + 71556^2 .

It is a cyclic number.

It is not a de Polignac number, because 11565942361 - 2³¹ = 9418458713 is a prime.

It is not a weakly prime, because it can be changed into another prime (11565942341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5782971180 + 5782971181.

It is an arithmetic number, because the mean of its divisors is an integer number (5782971181).

Almost surely, 2^11565942361 is an apocalyptic number.

It is an amenable number.

11565942361 is a deficient number, since it is larger than the sum of its proper divisors (1).

11565942361 is an equidigital number, since it uses as much as digits as its factorization.

11565942361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 43.

The spelling of 11565942361 in words is "eleven billion, five hundred sixty-five million, nine hundred forty-two thousand, three hundred sixty-one".