218668887169 has 8 divisors (see below), whose sum is σ = 218898313920. Its totient is φ = 218439538896.

The previous prime is 218668887161. The next prime is 218668887179. The reversal of 218668887169 is 961788866812.

218668887169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 218668887169 - 2³ = 218668887161 is a prime.

It is a super-2 number, since 2×218668887169² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 218668887098 and 218668887107.

It is not an unprimeable number, because it can be changed into a prime (218668887161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6741412 + ... + 6773770.

It is an arithmetic number, because the mean of its divisors is an integer number (27362289240).

Almost surely, 2^218668887169 is an apocalyptic number.

It is an amenable number.

218668887169 is a deficient number, since it is larger than the sum of its proper divisors (229426751).

218668887169 is a wasteful number, since it uses less digits than its factorization.

218668887169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39239.

The product of its digits is 111476736, while the sum is 70.

The spelling of 218668887169 in words is "two hundred eighteen billion, six hundred sixty-eight million, eight hundred eighty-seven thousand, one hundred sixty-nine".