181066690049736 has 32 divisors (see below), whose sum is σ = 452679847588800. Its totient is φ = 60353813688000.

The previous prime is 181066690049711. The next prime is 181066690049741. The reversal of 181066690049736 is 637940096660181.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108508596 + ... + 110164643.

It is an arithmetic number, because the mean of its divisors is an integer number (14146245237150).

Almost surely, 2^{181066690049736} is an apocalyptic number.

It is an amenable number.

181066690049736 is an abundant number, since it is smaller than the sum of its proper divisors (271613157539064).

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

181066690049736 is a wasteful number, since it uses less digits than its factorization.

181066690049736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218707749 (or 218707745 counting only the distinct ones).

The product of its (nonzero) digits is 70543872, while the sum is 66.

The spelling of 181066690049736 in words is "one hundred eighty-one trillion, sixty-six billion, six hundred ninety million, forty-nine thousand, seven hundred thirty-six".