42121632642 has 16 divisors (see below), whose sum is σ = 84293821152. Its totient is φ = 14032118240.

The previous prime is 42121632583. The next prime is 42121632667. The reversal of 42121632642 is 24623612124.

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 in 7 ways as a sum of consecutive naturals, for example, 2095659 + ... + 2115662.

It is an arithmetic number, because the mean of its divisors is an integer number (5268363822).

Almost surely, 2^42121632642 is an apocalyptic number.

42121632642 is an abundant number, since it is smaller than the sum of its proper divisors (42172188510).

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

42121632642 is a wasteful number, since it uses less digits than its factorization.

42121632642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4212993.

The product of its digits is 27648, while the sum is 33.

The spelling of 42121632642 in words is "forty-two billion, one hundred twenty-one million, six hundred thirty-two thousand, six hundred forty-two".