11665847161 has 2 divisors, whose sum is σ = 11665847162. Its totient is φ = 11665847160.

The previous prime is 11665847159. The next prime is 11665847177. The reversal of 11665847161 is 16174856611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10389928761 + 1275918400 = 101931^2 + 35720^2 .

It is a cyclic number.

It is not a de Polignac number, because 11665847161 - 2¹ = 11665847159 is a prime.

Together with 11665847159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11665827161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5832923580 + 5832923581.

It is an arithmetic number, because the mean of its divisors is an integer number (5832923581).

Almost surely, 2^11665847161 is an apocalyptic number.

It is an amenable number.

11665847161 is a deficient number, since it is larger than the sum of its proper divisors (1).

11665847161 is an equidigital number, since it uses as much as digits as its factorization.

11665847161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 46.

The spelling of 11665847161 in words is "eleven billion, six hundred sixty-five million, eight hundred forty-seven thousand, one hundred sixty-one".