42065541131523 has 128 divisors (see below), whose sum is σ = 72749657057280. Its totient is φ = 21023327969280.

The previous prime is 42065541131447. The next prime is 42065541131531. The reversal of 42065541131523 is 32513114556024.

It is not a de Polignac number, because 42065541131523 - 2⁹ = 42065541131011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42065541131423) 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 127 ways as a sum of consecutive naturals, for example, 209011140 + ... + 209212302.

It is an arithmetic number, because the mean of its divisors is an integer number (568356695760).

Almost surely, 2^{42065541131523} is an apocalyptic number.

42065541131523 is a deficient number, since it is larger than the sum of its proper divisors (30684115925757).

42065541131523 is a wasteful number, since it uses less digits than its factorization.

42065541131523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201709.

The product of its (nonzero) digits is 432000, while the sum is 42.

Adding to 42065541131523 its reverse (32513114556024), we get a palindrome (74578655687547).

The spelling of 42065541131523 in words is "forty-two trillion, sixty-five billion, five hundred forty-one million, one hundred thirty-one thousand, five hundred twenty-three".