181816068 has 96 divisors (see below), whose sum is σ = 499609600. Its totient is φ = 51438240.

The previous prime is 181816067. The next prime is 181816171. The reversal of 181816068 is 860618181.

It is not an unprimeable number, because it can be changed into a prime (181816067) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 670773 + ... + 671043.

Almost surely, 2^181816068 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 181816068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249804800).

181816068 is an abundant number, since it is smaller than the sum of its proper divisors (317793532).

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

181816068 is a wasteful number, since it uses less digits than its factorization.

181816068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 39.

The square root of 181816068 is about 13483.9188665610. The cubic root of 181816068 is about 566.5141394946.

The spelling of 181816068 in words is "one hundred eighty-one million, eight hundred sixteen thousand, sixty-eight".