181442764242 has 12 divisors (see below), whose sum is σ = 393125989230. Its totient is φ = 60480921408.

The previous prime is 181442764187. The next prime is 181442764271. The reversal of 181442764242 is 242467244181.

181442764242 is a `hidden beast` number, since 18 + 144 + 2 + 76 + 424 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 150645673161 + 30797091081 = 388131^2 + 175491^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5040076767 + ... + 5040076802.

Almost surely, 2^181442764242 is an apocalyptic number.

181442764242 is an abundant number, since it is smaller than the sum of its proper divisors (211683224988).

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

181442764242 is a wasteful number, since it uses less digits than its factorization.

181442764242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10080153577 (or 10080153574 counting only the distinct ones).

The product of its digits is 688128, while the sum is 45.

The spelling of 181442764242 in words is "one hundred eighty-one billion, four hundred forty-two million, seven hundred sixty-four thousand, two hundred forty-two".