42542541523 has 2 divisors, whose sum is σ = 42542541524. Its totient is φ = 42542541522.

The previous prime is 42542541511. The next prime is 42542541541. The reversal of 42542541523 is 32514524524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42542541523 - 2⁹ = 42542541011 is a prime.

It is not a weakly prime, because it can be changed into another prime (42542551523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21271270761 + 21271270762.

It is an arithmetic number, because the mean of its divisors is an integer number (21271270762).

Almost surely, 2^42542541523 is an apocalyptic number.

42542541523 is a deficient number, since it is larger than the sum of its proper divisors (1).

42542541523 is an equidigital number, since it uses as much as digits as its factorization.

42542541523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192000, while the sum is 37.

The spelling of 42542541523 in words is "forty-two billion, five hundred forty-two million, five hundred forty-one thousand, five hundred twenty-three".