18668125735546 has 16 divisors (see below), whose sum is σ = 32440891690944. Its totient is φ = 7891027707744.

The previous prime is 18668125735541. The next prime is 18668125735559. The reversal of 18668125735546 is 64553752186681.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18668125735541) 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 7 ways as a sum of consecutive naturals, for example, 9133132900 + ... + 9133134943.

It is an arithmetic number, because the mean of its divisors is an integer number (2027555730684).

Almost surely, 2^{18668125735546} is an apocalyptic number.

18668125735546 is a deficient number, since it is larger than the sum of its proper divisors (13772765955398).

18668125735546 is a wasteful number, since it uses less digits than its factorization.

18668125735546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18266267925.

The product of its digits is 290304000, while the sum is 67.

The spelling of 18668125735546 in words is "eighteen trillion, six hundred sixty-eight billion, one hundred twenty-five million, seven hundred thirty-five thousand, five hundred forty-six".