181382084442 has 96 divisors (see below), whose sum is σ = 446173378560. Its totient is φ = 52860314880.

The previous prime is 181382084441. The next prime is 181382084453. The reversal of 181382084442 is 244480283181.

181382084442 is a `hidden beast` number, since 1 + 81 + 38 + 20 + 84 + 442 = 666.

It is not an unprimeable number, because it can be changed into a prime (181382084441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74934 + ... + 606942.

It is an arithmetic number, because the mean of its divisors is an integer number (4647639360).

Almost surely, 2^181382084442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 181382084442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223086689280).

181382084442 is an abundant number, since it is smaller than the sum of its proper divisors (264791294118).

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

181382084442 is a wasteful number, since it uses less digits than its factorization.

181382084442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532108 (or 532105 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 45.

The spelling of 181382084442 in words is "one hundred eighty-one billion, three hundred eighty-two million, eighty-four thousand, four hundred forty-two".