218528562852 has 120 divisors (see below), whose sum is σ = 601581004640. Its totient is φ = 68981829120.

The previous prime is 218528562841. The next prime is 218528562883. The reversal of 218528562852 is 258265825812.

It is a happy number.

218528562852 is a `hidden beast` number, since 2 + 1 + 8 + 5 + 2 + 8 + 5 + 628 + 5 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 20500308 + ... + 20510964.

Almost surely, 2^218528562852 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 218528562852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300790502320).

218528562852 is an abundant number, since it is smaller than the sum of its proper divisors (383052441788).

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

218528562852 is a wasteful number, since it uses less digits than its factorization.

218528562852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14023 (or 14012 counting only the distinct ones).

The product of its digits is 6144000, while the sum is 54.

The spelling of 218528562852 in words is "two hundred eighteen billion, five hundred twenty-eight million, five hundred sixty-two thousand, eight hundred fifty-two".