161616329 has 8 divisors (see below), whose sum is σ = 186339840. Its totient is φ = 137301696.

The previous prime is 161616319. The next prime is 161616347. The reversal of 161616329 is 923616161.

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

It is not a de Polignac number, because 161616329 - 2²⁴ = 144839113 is a prime.

It is a super-2 number, since 2×161616329² = 52239675598872482, 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 not an unprimeable number, because it can be changed into a prime (161616319) 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 7 ways as a sum of consecutive naturals, for example, 101369 + ... + 102950.

It is an arithmetic number, because the mean of its divisors is an integer number (23292480).

Almost surely, 2^161616329 is an apocalyptic number.

It is an amenable number.

161616329 is a deficient number, since it is larger than the sum of its proper divisors (24723511).

161616329 is a wasteful number, since it uses less digits than its factorization.

161616329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204439.

The product of its digits is 11664, while the sum is 35.

The square root of 161616329 is about 12712.8411065348. The cubic root of 161616329 is about 544.7054818103.

The spelling of 161616329 in words is "one hundred sixty-one million, six hundred sixteen thousand, three hundred twenty-nine".