42040161834242 has 48 divisors (see below), whose sum is σ = 75058418807736. Its totient is φ = 17541774201600.

The previous prime is 42040161834239. The next prime is 42040161834259. The reversal of 42040161834242 is 24243816104024.

It can be written as a sum of positive squares in 4 ways, for example, as 5478778181041 + 36561383653201 = 2340679^2 + 6046601^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42040161834242.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36345083 + ... + 37483934.

Almost surely, 2^{42040161834242} is an apocalyptic number.

42040161834242 is a deficient number, since it is larger than the sum of its proper divisors (33018256973494).

42040161834242 is a wasteful number, since it uses less digits than its factorization.

42040161834242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73829235 (or 73829224 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 41.

Adding to 42040161834242 its reverse (24243816104024), we get a palindrome (66283977938266).

The spelling of 42040161834242 in words is "forty-two trillion, forty billion, one hundred sixty-one million, eight hundred thirty-four thousand, two hundred forty-two".