181166898 has 16 divisors (see below), whose sum is σ = 395273376. Its totient is φ = 54899040.

The previous prime is 181166893. The next prime is 181166899. The reversal of 181166898 is 898661181.

It is not an unprimeable number, because it can be changed into a prime (181166893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1372411 + ... + 1372542.

It is an arithmetic number, because the mean of its divisors is an integer number (24704586).

Almost surely, 2^181166898 is an apocalyptic number.

181166898 is an abundant number, since it is smaller than the sum of its proper divisors (214106478).

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

181166898 is a wasteful number, since it uses less digits than its factorization.

181166898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2744969.

The product of its digits is 165888, while the sum is 48.

The square root of 181166898 is about 13459.8253331906. The cubic root of 181166898 is about 565.8390936349.

The spelling of 181166898 in words is "one hundred eighty-one million, one hundred sixty-six thousand, eight hundred ninety-eight".