42040044224642 has 4 divisors (see below), whose sum is σ = 63060066336966. Its totient is φ = 21020022112320.

The previous prime is 42040044224627. The next prime is 42040044224677. The reversal of 42040044224642 is 24642244004024.

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., 40913408456881 + 1126635767761 = 6396359^2 + 1061431^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42040044224596 and 42040044224605.

It is an unprimeable number.

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, 10510011056159 + ... + 10510011056162.

Almost surely, 2^{42040044224642} is an apocalyptic number.

42040044224642 is a deficient number, since it is larger than the sum of its proper divisors (21020022112324).

42040044224642 is a wasteful number, since it uses less digits than its factorization.

42040044224642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21020022112323.

The product of its (nonzero) digits is 393216, while the sum is 38.

Adding to 42040044224642 its reverse (24642244004024), we get a palindrome (66682288228666).

The spelling of 42040044224642 in words is "forty-two trillion, forty billion, forty-four million, two hundred twenty-four thousand, six hundred forty-two".