181119618089 has 4 divisors (see below), whose sum is σ = 181624129920. Its totient is φ = 180615106260.

The previous prime is 181119618079. The next prime is 181119618091. The reversal of 181119618089 is 980816911181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 980816911181 = 79 ⋅12415403939.

It is a cyclic number.

It is not a de Polignac number, because 181119618089 - 2⁴ = 181119618073 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 181119618089.

It is not an unprimeable number, because it can be changed into a prime (181119618079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252255377 + ... + 252256094.

It is an arithmetic number, because the mean of its divisors is an integer number (45406032480).

Almost surely, 2^181119618089 is an apocalyptic number.

It is an amenable number.

181119618089 is a deficient number, since it is larger than the sum of its proper divisors (504511831).

181119618089 is an equidigital number, since it uses as much as digits as its factorization.

181119618089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504511830.

The product of its (nonzero) digits is 248832, while the sum is 53.

The spelling of 181119618089 in words is "one hundred eighty-one billion, one hundred nineteen million, six hundred eighteen thousand, eighty-nine".