18561782342196 has 72 divisors (see below), whose sum is σ = 46948993195104. Its totient is φ = 6183446592960.

The previous prime is 18561782342167. The next prime is 18561782342237. The reversal of 18561782342196 is 69124328716581.

It is a happy number.

18561782342196 is a `hidden beast` number, since 1 + 8 + 5 + 617 + 8 + 2 + 3 + 4 + 2 + 1 + 9 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 522746275 + ... + 522781781.

It is an arithmetic number, because the mean of its divisors is an integer number (652069349932).

Almost surely, 2^{18561782342196} is an apocalyptic number.

It is an amenable number.

18561782342196 is an abundant number, since it is smaller than the sum of its proper divisors (28387210852908).

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

18561782342196 is a wasteful number, since it uses less digits than its factorization.

18561782342196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44061 (or 44056 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The spelling of 18561782342196 in words is "eighteen trillion, five hundred sixty-one billion, seven hundred eighty-two million, three hundred forty-two thousand, one hundred ninety-six".