218581350881 has 16 divisors (see below), whose sum is σ = 224199679680. Its totient is φ = 213030900480.

The previous prime is 218581350797. The next prime is 218581350887. The reversal of 218581350881 is 188053185812.

It is a cyclic number.

It is not a de Polignac number, because 218581350881 - 2²⁶ = 218514242017 is a prime.

It is a super-2 number, since 2×218581350881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218581350887) 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, 6344141 + ... + 6378501.

It is an arithmetic number, because the mean of its divisors is an integer number (14012479980).

Almost surely, 2^218581350881 is an apocalyptic number.

It is an amenable number.

218581350881 is a deficient number, since it is larger than the sum of its proper divisors (5618328799).

218581350881 is a wasteful number, since it uses less digits than its factorization.

218581350881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35344.

The product of its (nonzero) digits is 614400, while the sum is 50.

The spelling of 218581350881 in words is "two hundred eighteen billion, five hundred eighty-one million, three hundred fifty thousand, eight hundred eighty-one".