218853356856 has 32 divisors (see below), whose sum is σ = 553725365760. Its totient is φ = 72072189152.

The previous prime is 218853356837. The next prime is 218853356857. The reversal of 218853356856 is 658653358812.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 218853356856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218853356857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54931080 + ... + 54935063.

It is an arithmetic number, because the mean of its divisors is an integer number (17303917680).

Almost surely, 2^218853356856 is an apocalyptic number.

It is an amenable number.

218853356856 is an abundant number, since it is smaller than the sum of its proper divisors (334872008904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218853356856 is a wasteful number, since it uses less digits than its factorization.

218853356856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109866235 (or 109866231 counting only the distinct ones).

The product of its digits is 41472000, while the sum is 60.

The spelling of 218853356856 in words is "two hundred eighteen billion, eight hundred fifty-three million, three hundred fifty-six thousand, eight hundred fifty-six".