188504135918 has 24 divisors (see below), whose sum is σ = 339530825664. Its totient is φ = 78181437600.

The previous prime is 188504135917. The next prime is 188504135929. The reversal of 188504135918 is 819531405881.

It is a self number, because there is not a number n which added to its sum of digits gives 188504135918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188504135917) 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 11 ways as a sum of consecutive naturals, for example, 31021343 + ... + 31027418.

It is an arithmetic number, because the mean of its divisors is an integer number (14147117736).

Almost surely, 2^188504135918 is an apocalyptic number.

188504135918 is a deficient number, since it is larger than the sum of its proper divisors (151026689746).

188504135918 is a wasteful number, since it uses less digits than its factorization.

188504135918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62048808 (or 62048801 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 53.

The spelling of 188504135918 in words is "one hundred eighty-eight billion, five hundred four million, one hundred thirty-five thousand, nine hundred eighteen".