42112216642543 has 16 divisors (see below), whose sum is σ = 44474575158720. Its totient is φ = 39813589414144.

The previous prime is 42112216642453. The next prime is 42112216642547. The reversal of 42112216642543 is 34524661221124.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42112216642543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42112216642543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42112216642547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26462446 + ... + 28008667.

It is an arithmetic number, because the mean of its divisors is an integer number (2779660947420).

Almost surely, 2^{42112216642543} is an apocalyptic number.

42112216642543 is a deficient number, since it is larger than the sum of its proper divisors (2362358516177).

42112216642543 is a wasteful number, since it uses less digits than its factorization.

42112216642543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54471698.

The product of its digits is 552960, while the sum is 43.

Adding to 42112216642543 its reverse (34524661221124), we get a palindrome (76636877863667).

The spelling of 42112216642543 in words is "forty-two trillion, one hundred twelve billion, two hundred sixteen million, six hundred forty-two thousand, five hundred forty-three".