42185891206 has 4 divisors (see below), whose sum is σ = 63278836812. Its totient is φ = 21092945602.

The previous prime is 42185891203. The next prime is 42185891227. The reversal of 42185891206 is 60219858124.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42185891203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10546472800 + ... + 10546472803.

It is an arithmetic number, because the mean of its divisors is an integer number (15819709203).

Almost surely, 2^42185891206 is an apocalyptic number.

42185891206 is a deficient number, since it is larger than the sum of its proper divisors (21092945606).

42185891206 is a wasteful number, since it uses less digits than its factorization.

42185891206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21092945605.

The product of its (nonzero) digits is 276480, while the sum is 46.

The spelling of 42185891206 in words is "forty-two billion, one hundred eighty-five million, eight hundred ninety-one thousand, two hundred six".