42000123563 has 4 divisors (see below), whose sum is σ = 42002476320. Its totient is φ = 41997770808.

The previous prime is 42000123541. The next prime is 42000123569. The reversal of 42000123563 is 36532100024.

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 42000123563 - 2⁶ = 42000123499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42000123569) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1149395 + ... + 1185372.

It is an arithmetic number, because the mean of its divisors is an integer number (10500619080).

Almost surely, 2^42000123563 is an apocalyptic number.

42000123563 is a deficient number, since it is larger than the sum of its proper divisors (2352757).

42000123563 is a wasteful number, since it uses less digits than its factorization.

42000123563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2352756.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 42000123563 its reverse (36532100024), we get a palindrome (78532223587).

The spelling of 42000123563 in words is "forty-two billion, one hundred twenty-three thousand, five hundred sixty-three".