218574736442 has 16 divisors (see below), whose sum is σ = 328559884800. Its totient is φ = 109055017440.

The previous prime is 218574736417. The next prime is 218574736447. The reversal of 218574736442 is 244637475812.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (218574736447) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1771559 + ... + 1890917.

It is an arithmetic number, because the mean of its divisors is an integer number (20534992800).

Almost surely, 2^218574736442 is an apocalyptic number.

218574736442 is a deficient number, since it is larger than the sum of its proper divisors (109985148358).

218574736442 is a wasteful number, since it uses less digits than its factorization.

218574736442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121301.

The product of its digits is 9031680, while the sum is 53.

The spelling of 218574736442 in words is "two hundred eighteen billion, five hundred seventy-four million, seven hundred thirty-six thousand, four hundred forty-two".