161838112 has 24 divisors (see below), whose sum is σ = 320658156. Its totient is φ = 80401152.

The previous prime is 161838107. The next prime is 161838119. The reversal of 161838112 is 211838161.

It can be written as a sum of positive squares in 2 ways, for example, as 157854096 + 3984016 = 12564^2 + 1996^2 .

It is not an unprimeable number, because it can be changed into a prime (161838119) 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 3 ways as a sum of consecutive naturals, for example, 11083 + ... + 21130.

Almost surely, 2^161838112 is an apocalyptic number.

It is an amenable number.

161838112 is a deficient number, since it is larger than the sum of its proper divisors (158820044).

161838112 is a wasteful number, since it uses less digits than its factorization.

161838112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32380 (or 32372 counting only the distinct ones).

The product of its digits is 2304, while the sum is 31.

The square root of 161838112 is about 12721.5609105172. The cubic root of 161838112 is about 544.9545308979.

The spelling of 161838112 in words is "one hundred sixty-one million, eight hundred thirty-eight thousand, one hundred twelve".