218484612718 has 4 divisors (see below), whose sum is σ = 327726919080. Its totient is φ = 109242306358.

The previous prime is 218484612691. The next prime is 218484612719. The reversal of 218484612718 is 817216484812.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218484612719) 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 as a sum of consecutive naturals, namely, 54621153178 + ... + 54621153181.

It is an arithmetic number, because the mean of its divisors is an integer number (81931729770).

Almost surely, 2^218484612718 is an apocalyptic number.

218484612718 is a deficient number, since it is larger than the sum of its proper divisors (109242306362).

218484612718 is a wasteful number, since it uses less digits than its factorization.

218484612718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109242306361.

The product of its digits is 1376256, while the sum is 52.

The spelling of 218484612718 in words is "two hundred eighteen billion, four hundred eighty-four million, six hundred twelve thousand, seven hundred eighteen".