181664112 has 80 divisors (see below), whose sum is σ = 549464832. Its totient is φ = 50634240.

The previous prime is 181664099. The next prime is 181664129. The reversal of 181664112 is 211466181.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 181664112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7183 + ... + 20369.

Almost surely, 2^181664112 is an apocalyptic number.

181664112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 181664112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274732416).

181664112 is an abundant number, since it is smaller than the sum of its proper divisors (367800720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181664112 is a wasteful number, since it uses less digits than its factorization.

181664112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13246 (or 13240 counting only the distinct ones).

The product of its digits is 2304, while the sum is 30.

The square root of 181664112 is about 13478.2829767000. The cubic root of 181664112 is about 566.3562707629.

The spelling of 181664112 in words is "one hundred eighty-one million, six hundred sixty-four thousand, one hundred twelve".