42542541491 has 4 divisors (see below), whose sum is σ = 44392217232. Its totient is φ = 40692865752.

The previous prime is 42542541469. The next prime is 42542541511. The reversal of 42542541491 is 19414524524.

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 42542541491 - 2⁶ = 42542541427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42542541421) 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 in 3 ways as a sum of consecutive naturals, for example, 924837836 + ... + 924837881.

It is an arithmetic number, because the mean of its divisors is an integer number (11098054308).

Almost surely, 2^42542541491 is an apocalyptic number.

42542541491 is a deficient number, since it is larger than the sum of its proper divisors (1849675741).

42542541491 is a wasteful number, since it uses less digits than its factorization.

42542541491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1849675740.

The product of its digits is 230400, while the sum is 41.

The spelling of 42542541491 in words is "forty-two billion, five hundred forty-two million, five hundred forty-one thousand, four hundred ninety-one".