42031616642 has 4 divisors (see below), whose sum is σ = 63047424966. Its totient is φ = 21015808320.

The previous prime is 42031616591. The next prime is 42031616681. The reversal of 42031616642 is 24661613024.

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., 29704177801 + 12327438841 = 172349^2 + 111029^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10507904159 + ... + 10507904162.

Almost surely, 2^42031616642 is an apocalyptic number.

42031616642 is a deficient number, since it is larger than the sum of its proper divisors (21015808324).

42031616642 is a wasteful number, since it uses less digits than its factorization.

42031616642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21015808323.

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 42031616642 in words is "forty-two billion, thirty-one million, six hundred sixteen thousand, six hundred forty-two".