5555572218 has 64 divisors (see below), whose sum is σ = 14141952000. Its totient is φ = 1583643312.

The previous prime is 5555572199. The next prime is 5555572223. The reversal of 5555572218 is 8122755555.

5555572218 is a `hidden beast` number, since 5 + 5 + 55 + 572 + 21 + 8 = 666.

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, 149203 + ... + 182681.

It is an arithmetic number, because the mean of its divisors is an integer number (220968000).

Almost surely, 2^5555572218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5555572218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7070976000).

5555572218 is an abundant number, since it is smaller than the sum of its proper divisors (8586379782).

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

5555572218 is a wasteful number, since it uses less digits than its factorization.

5555572218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33936 (or 33930 counting only the distinct ones).

The product of its digits is 700000, while the sum is 45.

The square root of 5555572218 is about 74535.7110249845. The cubic root of 5555572218 is about 1771.0993859515.

The spelling of 5555572218 in words is "five billion, five hundred fifty-five million, five hundred seventy-two thousand, two hundred eighteen".