218353518845 has 16 divisors (see below), whose sum is σ = 326679550848. Its totient is φ = 136116479040.

The previous prime is 218353518839. The next prime is 218353518853. The reversal of 218353518845 is 548815353812.

It is not a de Polignac number, because 218353518845 - 2²² = 218349324541 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283575614 + ... + 283576383.

It is an arithmetic number, because the mean of its divisors is an integer number (20417471928).

Almost surely, 2^218353518845 is an apocalyptic number.

It is an amenable number.

218353518845 is a deficient number, since it is larger than the sum of its proper divisors (108326032003).

218353518845 is a wasteful number, since it uses less digits than its factorization.

218353518845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567152020.

The product of its digits is 4608000, while the sum is 53.

The spelling of 218353518845 in words is "two hundred eighteen billion, three hundred fifty-three million, five hundred eighteen thousand, eight hundred forty-five".