161834165 has 4 divisors (see below), whose sum is σ = 194201004. Its totient is φ = 129467328.

The previous prime is 161834161. The next prime is 161834171. The reversal of 161834165 is 561438161.

161834165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 84235684 + 77598481 = 9178^2 + 8809^2 .

It is a cyclic number.

It is not a de Polignac number, because 161834165 - 2² = 161834161 is a prime.

It is a super-2 number, since 2×161834165² = 52380593922494450, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161834161) 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, 16183412 + ... + 16183421.

It is an arithmetic number, because the mean of its divisors is an integer number (48550251).

Almost surely, 2^161834165 is an apocalyptic number.

It is an amenable number.

161834165 is a deficient number, since it is larger than the sum of its proper divisors (32366839).

161834165 is an equidigital number, since it uses as much as digits as its factorization.

161834165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32366838.

The product of its digits is 17280, while the sum is 35.

The square root of 161834165 is about 12721.4057792368. The cubic root of 161834165 is about 544.9501006414.

The spelling of 161834165 in words is "one hundred sixty-one million, eight hundred thirty-four thousand, one hundred sixty-five".