218668570354 has 12 divisors (see below), whose sum is σ = 355174690266. Its totient is φ = 100923955392.

The previous prime is 218668570339. The next prime is 218668570361. The reversal of 218668570354 is 453075866812.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 76769447329 + 141899123025 = 277073^2 + 376695^2 .

It is a junction number, because it is equal to n+sod(n) for n = 218668570295 and 218668570304.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 323473879 + ... + 323474554.

Almost surely, 2^218668570354 is an apocalyptic number.

218668570354 is a deficient number, since it is larger than the sum of its proper divisors (136506119912).

218668570354 is a wasteful number, since it uses less digits than its factorization.

218668570354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646948461 (or 646948448 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 55.

The spelling of 218668570354 in words is "two hundred eighteen billion, six hundred sixty-eight million, five hundred seventy thousand, three hundred fifty-four".