161304911 has 12 divisors (see below), whose sum is σ = 172369008. Its totient is φ = 150663744.

The previous prime is 161304907. The next prime is 161304929. The reversal of 161304911 is 119403161.

It is not a de Polignac number, because 161304911 - 2² = 161304907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161304511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40631 + ... + 44423.

It is an arithmetic number, because the mean of its divisors is an integer number (14364084).

Almost surely, 2^161304911 is an apocalyptic number.

161304911 is a deficient number, since it is larger than the sum of its proper divisors (11064097).

161304911 is an equidigital number, since it uses as much as digits as its factorization.

161304911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3902 (or 3859 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 161304911 is about 12700.5870336768. The cubic root of 161304911 is about 544.3553930879.

The spelling of 161304911 in words is "one hundred sixty-one million, three hundred four thousand, nine hundred eleven".