181343905042 has 16 divisors (see below), whose sum is σ = 277196563800. Its totient is φ = 88945647232.

The previous prime is 181343905019. The next prime is 181343905069. The reversal of 181343905042 is 240509343181.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 146314665121 + 35029239921 = 382511^2 + 187161^2 .

It is a super-2 number, since 2×181343905042² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 181343904986 and 181343905004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 473748 + ... + 766240.

Almost surely, 2^181343905042 is an apocalyptic number.

181343905042 is a deficient number, since it is larger than the sum of its proper divisors (95852658758).

181343905042 is a wasteful number, since it uses less digits than its factorization.

181343905042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298397.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 181343905042 in words is "one hundred eighty-one billion, three hundred forty-three million, nine hundred five thousand, forty-two".