18055191131208 has 288 divisors, whose sum is σ = 65320267428000. Its totient is φ = 4442835640320.

The previous prime is 18055191131203. The next prime is 18055191131261. The reversal of 18055191131208 is 80213119155081.

18055191131208 is a `hidden beast` number, since 1 + 8 + 0 + 5 + 519 + 1 + 1 + 3 + 120 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (18055191131203) by changing a digit.

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 71 ways as a sum of consecutive naturals, for example, 11505913 + ... + 12980616.

It is an arithmetic number, because the mean of its divisors is an integer number (226806484125).

Almost surely, 2^{18055191131208} is an apocalyptic number.

18055191131208 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18055191131208 is an abundant number, since it is smaller than the sum of its proper divisors (47265076296792).

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

18055191131208 is a wasteful number, since it uses less digits than its factorization.

18055191131208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24486585 (or 24486571 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 45.

The spelling of 18055191131208 in words is "eighteen trillion, fifty-five billion, one hundred ninety-one million, one hundred thirty-one thousand, two hundred eight".