218180571842 has 16 divisors (see below), whose sum is σ = 335614066200. Its totient is φ = 106314946560.

The previous prime is 218180571827. The next prime is 218180571901. The reversal of 218180571842 is 248175081812.

It is a happy number.

218180571842 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 143329630921 + 74850940921 = 378589^2 + 273589^2 .

It is an unprimeable number.

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, 1355867 + ... + 1508222.

Almost surely, 2^218180571842 is an apocalyptic number.

218180571842 is a deficient number, since it is larger than the sum of its proper divisors (117433494358).

218180571842 is a wasteful number, since it uses less digits than its factorization.

218180571842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2865061.

The product of its (nonzero) digits is 286720, while the sum is 47.

The spelling of 218180571842 in words is "two hundred eighteen billion, one hundred eighty million, five hundred seventy-one thousand, eight hundred forty-two".