42405044243 has 4 divisors (see below), whose sum is σ = 43772948928. Its totient is φ = 41037139560.

The previous prime is 42405044203. The next prime is 42405044257. The reversal of 42405044243 is 34244050424.

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

It is a cyclic number.

It is not a de Polignac number, because 42405044243 - 2⁸ = 42405043987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42405044203) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 683952296 + ... + 683952357.

It is an arithmetic number, because the mean of its divisors is an integer number (10943237232).

Almost surely, 2^42405044243 is an apocalyptic number.

42405044243 is a deficient number, since it is larger than the sum of its proper divisors (1367904685).

42405044243 is a wasteful number, since it uses less digits than its factorization.

42405044243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367904684.

The product of its (nonzero) digits is 61440, while the sum is 32.

Adding to 42405044243 its reverse (34244050424), we get a palindrome (76649094667).

The spelling of 42405044243 in words is "forty-two billion, four hundred five million, forty-four thousand, two hundred forty-three".