11665827161 has 2 divisors, whose sum is σ = 11665827162. Its totient is φ = 11665827160.

The previous prime is 11665827137. The next prime is 11665827167. The reversal of 11665827161 is 16172856611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11590675600 + 75151561 = 107660^2 + 8669^2 .

It is a cyclic number.

It is not a de Polignac number, because 11665827161 - 2³⁰ = 10592085337 is a prime.

It is not a weakly prime, because it can be changed into another prime (11665827167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5832913580 + 5832913581.

It is an arithmetic number, because the mean of its divisors is an integer number (5832913581).

Almost surely, 2^11665827161 is an apocalyptic number.

It is an amenable number.

11665827161 is a deficient number, since it is larger than the sum of its proper divisors (1).

11665827161 is an equidigital number, since it uses as much as digits as its factorization.

11665827161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 44.

The spelling of 11665827161 in words is "eleven billion, six hundred sixty-five million, eight hundred twenty-seven thousand, one hundred sixty-one".