11605155161 has 2 divisors, whose sum is σ = 11605155162. Its totient is φ = 11605155160.

The previous prime is 11605155139. The next prime is 11605155181. The reversal of 11605155161 is 16155150611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10076345161 + 1528810000 = 100381^2 + 39100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11605155161 is a prime.

It is not a weakly prime, because it can be changed into another prime (11605155131) 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, 5802577580 + 5802577581.

It is an arithmetic number, because the mean of its divisors is an integer number (5802577581).

Almost surely, 2^11605155161 is an apocalyptic number.

It is an amenable number.

11605155161 is a deficient number, since it is larger than the sum of its proper divisors (1).

11605155161 is an equidigital number, since it uses as much as digits as its factorization.

11605155161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 32.

The spelling of 11605155161 in words is "eleven billion, six hundred five million, one hundred fifty-five thousand, one hundred sixty-one".