42542687836 has 24 divisors (see below), whose sum is σ = 81245445120. Its totient is φ = 19331017200.

The previous prime is 42542687821. The next prime is 42542687857. The reversal of 42542687836 is 63878624524.

It is a super-2 number, since 2×42542687836² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 31996 + ... + 293443.

It is an arithmetic number, because the mean of its divisors is an integer number (3385226880).

Almost surely, 2^42542687836 is an apocalyptic number.

It is an amenable number.

42542687836 is a deficient number, since it is larger than the sum of its proper divisors (38702757284).

42542687836 is a wasteful number, since it uses less digits than its factorization.

42542687836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328425 (or 328423 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 55.

The spelling of 42542687836 in words is "forty-two billion, five hundred forty-two million, six hundred eighty-seven thousand, eight hundred thirty-six".