181163361181 has 12 divisors (see below), whose sum is σ = 199146858400. Its totient is φ = 164680001640.

The previous prime is 181163361173. The next prime is 181163361233.

181163361181 is nontrivially palindromic in base 10.

181163361181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 181163361181 - 2³ = 181163361173 is a prime.

It is a super-3 number, since 3×181163361181³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181163361101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1535350 + ... + 1649128.

Almost surely, 2^181163361181 is an apocalyptic number.

181163361181 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

181163361181 is a deficient number, since it is larger than the sum of its proper divisors (17983497219).

181163361181 is a wasteful number, since it uses less digits than its factorization.

181163361181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126960 (or 126949 counting only the distinct ones).

The product of its digits is 20736, while the sum is 40.

The spelling of 181163361181 in words is "one hundred eighty-one billion, one hundred sixty-three million, three hundred sixty-one thousand, one hundred eighty-one".