218170873788065 has 32 divisors (see below), whose sum is σ = 285923281992192. Its totient is φ = 158493283168000.

The previous prime is 218170873788041. The next prime is 218170873788103. The reversal of 218170873788065 is 560887378071812.

It is not a de Polignac number, because 218170873788065 - 2¹² = 218170873783969 is a prime.

It is a super-3 number, since 3×218170873788065³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 218170873788065.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 177722675 + ... + 178946055.

It is an arithmetic number, because the mean of its divisors is an integer number (8935102562256).

Almost surely, 2^{218170873788065} is an apocalyptic number.

It is an amenable number.

218170873788065 is a deficient number, since it is larger than the sum of its proper divisors (67752408204127).

218170873788065 is a wasteful number, since it uses less digits than its factorization.

218170873788065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227001.

The product of its (nonzero) digits is 252887040, while the sum is 71.

The spelling of 218170873788065 in words is "two hundred eighteen trillion, one hundred seventy billion, eight hundred seventy-three million, seven hundred eighty-eight thousand, sixty-five".