181168642 has 8 divisors (see below), whose sum is σ = 272063376. Its totient is φ = 90480852.

The previous prime is 181168633. The next prime is 181168679. The reversal of 181168642 is 246861181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49528 + ... + 53059.

It is an arithmetic number, because the mean of its divisors is an integer number (34007922).

Almost surely, 2^181168642 is an apocalyptic number.

181168642 is a deficient number, since it is larger than the sum of its proper divisors (90894734).

181168642 is a wasteful number, since it uses less digits than its factorization.

181168642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103472.

The product of its digits is 18432, while the sum is 37.

The square root of 181168642 is about 13459.8901184222. The cubic root of 181168642 is about 565.8409093091.

The spelling of 181168642 in words is "one hundred eighty-one million, one hundred sixty-eight thousand, six hundred forty-two".