161094845 has 4 divisors (see below), whose sum is σ = 193313820. Its totient is φ = 128875872.

The previous prime is 161094841. The next prime is 161094847. The reversal of 161094845 is 548490161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 548490161 = 31 ⋅17693231.

It can be written as a sum of positive squares in 2 ways, for example, as 21335161 + 139759684 = 4619^2 + 11822^2 .

It is a cyclic number.

It is not a de Polignac number, because 161094845 - 2² = 161094841 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 161094799 and 161094808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161094841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16109480 + ... + 16109489.

It is an arithmetic number, because the mean of its divisors is an integer number (48328455).

Almost surely, 2^161094845 is an apocalyptic number.

It is an amenable number.

161094845 is a deficient number, since it is larger than the sum of its proper divisors (32218975).

161094845 is an equidigital number, since it uses as much as digits as its factorization.

161094845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32218974.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 161094845 is about 12692.3144067581. The cubic root of 161094845 is about 544.1189873176.

The spelling of 161094845 in words is "one hundred sixty-one million, ninety-four thousand, eight hundred forty-five".