42181858874 has 4 divisors (see below), whose sum is σ = 63272788314. Its totient is φ = 21090929436.

The previous prime is 42181858847. The next prime is 42181858963. The reversal of 42181858874 is 47885818124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 36078343249 + 6103515625 = 189943^2 + 78125^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 10545464717 + ... + 10545464720.

Almost surely, 2^42181858874 is an apocalyptic number.

42181858874 is a deficient number, since it is larger than the sum of its proper divisors (21090929440).

42181858874 is a wasteful number, since it uses less digits than its factorization.

42181858874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21090929439.

The product of its digits is 4587520, while the sum is 56.

The spelling of 42181858874 in words is "forty-two billion, one hundred eighty-one million, eight hundred fifty-eight thousand, eight hundred seventy-four".