218318614455 has 32 divisors (see below), whose sum is σ = 359392340160. Its totient is φ = 113100549120.

The previous prime is 218318614439. The next prime is 218318614477. The reversal of 218318614455 is 554416813812.

It is a happy number.

It is not a de Polignac number, because 218318614455 - 2⁴ = 218318614439 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 634252 + ... + 915921.

It is an arithmetic number, because the mean of its divisors is an integer number (11231010630).

Almost surely, 2^218318614455 is an apocalyptic number.

218318614455 is a deficient number, since it is larger than the sum of its proper divisors (141073725705).

218318614455 is a wasteful number, since it uses less digits than its factorization.

218318614455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550451.

The product of its digits is 921600, while the sum is 48.

The spelling of 218318614455 in words is "two hundred eighteen billion, three hundred eighteen million, six hundred fourteen thousand, four hundred fifty-five".