161646346 has 32 divisors (see below), whose sum is σ = 258635520. Its totient is φ = 75613824.

The previous prime is 161646341. The next prime is 161646349. The reversal of 161646346 is 643646161.

It is a super-2 number, since 2×161646346² = 52259082350303432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161646341) 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 15 ways as a sum of consecutive naturals, for example, 516286 + ... + 516598.

It is an arithmetic number, because the mean of its divisors is an integer number (8082360).

Almost surely, 2^161646346 is an apocalyptic number.

161646346 is a deficient number, since it is larger than the sum of its proper divisors (96989174).

161646346 is a wasteful number, since it uses less digits than its factorization.

161646346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550.

The product of its digits is 62208, while the sum is 37.

The square root of 161646346 is about 12714.0216296811. The cubic root of 161646346 is about 544.7392024382.

The spelling of 161646346 in words is "one hundred sixty-one million, six hundred forty-six thousand, three hundred forty-six".