181116345810 has 32 divisors (see below), whose sum is σ = 434691074880. Its totient is φ = 48296376128.

The previous prime is 181116345749. The next prime is 181116345821. The reversal of 181116345810 is 18543611181.

It is a happy number.

It is a super-2 number, since 2×181116345810² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1603144 + ... + 1712396.

It is an arithmetic number, because the mean of its divisors is an integer number (13584096090).

Almost surely, 2^181116345810 is an apocalyptic number.

181116345810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

181116345810 is an abundant number, since it is smaller than the sum of its proper divisors (253574729070).

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

181116345810 is a wasteful number, since it uses less digits than its factorization.

181116345810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164522.

The product of its (nonzero) digits is 23040, while the sum is 39.

Adding to 181116345810 its reverse (18543611181), we get a palindrome (199659956991).

The spelling of 181116345810 in words is "one hundred eighty-one billion, one hundred sixteen million, three hundred forty-five thousand, eight hundred ten".