161952161 has 8 divisors (see below), whose sum is σ = 185165184. Its totient is φ = 138758400.

The previous prime is 161952157. The next prime is 161952163. The reversal of 161952161 is 161259161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161952161 - 2² = 161952157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161952163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30236 + ... + 35186.

It is an arithmetic number, because the mean of its divisors is an integer number (23145648).

Almost surely, 2^161952161 is an apocalyptic number.

It is an amenable number.

161952161 is a deficient number, since it is larger than the sum of its proper divisors (23213023).

161952161 is an equidigital number, since it uses as much as digits as its factorization.

161952161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9631.

The product of its digits is 3240, while the sum is 32.

The square root of 161952161 is about 12726.0426291915. The cubic root of 161952161 is about 545.0825125470.

The spelling of 161952161 in words is "one hundred sixty-one million, nine hundred fifty-two thousand, one hundred sixty-one".