218688902117 has 16 divisors (see below), whose sum is σ = 250385893632. Its totient is φ = 187106156160.

The previous prime is 218688902087. The next prime is 218688902119. The reversal of 218688902117 is 711209886812.

It is not a de Polignac number, because 218688902117 - 2¹⁴ = 218688885733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218688902119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9107267 + ... + 9131247.

It is an arithmetic number, because the mean of its divisors is an integer number (15649118352).

Almost surely, 2^218688902117 is an apocalyptic number.

It is an amenable number.

218688902117 is a deficient number, since it is larger than the sum of its proper divisors (31696991515).

218688902117 is a wasteful number, since it uses less digits than its factorization.

218688902117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26308.

The product of its (nonzero) digits is 774144, while the sum is 53.

The spelling of 218688902117 in words is "two hundred eighteen billion, six hundred eighty-eight million, nine hundred two thousand, one hundred seventeen".