161106065 has 4 divisors (see below), whose sum is σ = 193327284. Its totient is φ = 128884848.

The previous prime is 161106031. The next prime is 161106067. The reversal of 161106065 is 560601161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 560601161 = 71 ⋅7895791.

It can be written as a sum of positive squares in 2 ways, for example, as 99121936 + 61984129 = 9956^2 + 7873^2 .

It is a cyclic number.

It is not a de Polignac number, because 161106065 - 2¹⁴ = 161089681 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161106067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16110602 + ... + 16110611.

It is an arithmetic number, because the mean of its divisors is an integer number (48331821).

Almost surely, 2^161106065 is an apocalyptic number.

It is an amenable number.

161106065 is a deficient number, since it is larger than the sum of its proper divisors (32221219).

161106065 is an equidigital number, since it uses as much as digits as its factorization.

161106065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32221218.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 161106065 is about 12692.7563988284. The cubic root of 161106065 is about 544.1316193653.

The spelling of 161106065 in words is "one hundred sixty-one million, one hundred six thousand, sixty-five".