181244609228 has 12 divisors (see below), whose sum is σ = 319459923720. Its totient is φ = 89970345312.

The previous prime is 181244609167. The next prime is 181244609237. The reversal of 181244609228 is 822906442181.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162989201 + ... + 162990312.

It is an arithmetic number, because the mean of its divisors is an integer number (26621660310).

Almost surely, 2^181244609228 is an apocalyptic number.

It is an amenable number.

181244609228 is a deficient number, since it is larger than the sum of its proper divisors (138215314492).

181244609228 is a wasteful number, since it uses less digits than its factorization.

181244609228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325979656 (or 325979654 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 47.

The spelling of 181244609228 in words is "one hundred eighty-one billion, two hundred forty-four million, six hundred nine thousand, two hundred twenty-eight".