218441405898 has 48 divisors (see below), whose sum is σ = 479859883776. Its totient is φ = 71803368000.

The previous prime is 218441405887. The next prime is 218441405921. The reversal of 218441405898 is 898504144812.

218441405898 is a `hidden beast` number, since 2 + 1 + 8 + 44 + 14 + 0 + 589 + 8 = 666.

218441405898 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9590023 + ... + 9612773.

It is an arithmetic number, because the mean of its divisors is an integer number (9997080912).

Almost surely, 2^218441405898 is an apocalyptic number.

218441405898 is an abundant number, since it is smaller than the sum of its proper divisors (261418477878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218441405898 is a wasteful number, since it uses less digits than its factorization.

218441405898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30139 (or 30136 counting only the distinct ones).

The product of its (nonzero) digits is 2949120, while the sum is 54.

The spelling of 218441405898 in words is "two hundred eighteen billion, four hundred forty-one million, four hundred five thousand, eight hundred ninety-eight".