181084251728 has 20 divisors (see below), whose sum is σ = 366105118368. Its totient is φ = 86605511520.

The previous prime is 181084251727. The next prime is 181084251731. The reversal of 181084251728 is 827152480181.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181084251721) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 246038018 + ... + 246038753.

Almost surely, 2^181084251728 is an apocalyptic number.

It is an amenable number.

181084251728 is an abundant number, since it is smaller than the sum of its proper divisors (185020866640).

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

181084251728 is a wasteful number, since it uses less digits than its factorization.

181084251728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492076802 (or 492076796 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 47.

The spelling of 181084251728 in words is "one hundred eighty-one billion, eighty-four million, two hundred fifty-one thousand, seven hundred twenty-eight".