542637918 has 24 divisors (see below), whose sum is σ = 1176411600. Its totient is φ = 180772224.

The previous prime is 542637871. The next prime is 542638007. The reversal of 542637918 is 819736245.

542637918 is a `hidden beast` number, since 5 + 4 + 2 + 637 + 9 + 1 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 26023 + ... + 41981.

It is an arithmetic number, because the mean of its divisors is an integer number (49017150).

Almost surely, 2^542637918 is an apocalyptic number.

542637918 is an abundant number, since it is smaller than the sum of its proper divisors (633773682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

542637918 is a wasteful number, since it uses less digits than its factorization.

542637918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17856 (or 17853 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 542637918 is about 23294.5898869244. The cubic root of 542637918 is about 815.6491336850.

The spelling of 542637918 in words is "five hundred forty-two million, six hundred thirty-seven thousand, nine hundred eighteen".