218140655711218 has 8 divisors (see below), whose sum is σ = 327212397498348. Its totient is φ = 109069856545104.

The previous prime is 218140655711203. The next prime is 218140655711299. The reversal of 218140655711218 is 812117556041812.

It can be written as a sum of positive squares in 2 ways, for example, as 215742719841489 + 2397935869729 = 14688183^2 + 1548527^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×218140655711218² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235076421 + ... + 236002552.

Almost surely, 2^{218140655711218} is an apocalyptic number.

218140655711218 is a deficient number, since it is larger than the sum of its proper divisors (109071741787130).

218140655711218 is a wasteful number, since it uses less digits than its factorization.

218140655711218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471310508.

The product of its (nonzero) digits is 1075200, while the sum is 52.

The spelling of 218140655711218 in words is "two hundred eighteen trillion, one hundred forty billion, six hundred fifty-five million, seven hundred eleven thousand, two hundred eighteen".