2220656564 has 96 divisors (see below), whose sum is σ = 4651637760. Its totient is φ = 908070912.

The previous prime is 2220656561. The next prime is 2220656653. The reversal of 2220656564 is 4656560222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220656561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16209104 + ... + 16209240.

It is an arithmetic number, because the mean of its divisors is an integer number (48454560).

Almost surely, 2^2220656564 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 2220656564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2325818880).

2220656564 is an abundant number, since it is smaller than the sum of its proper divisors (2430981196).

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

2220656564 is a wasteful number, since it uses less digits than its factorization.

2220656564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417 (or 415 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

The square root of 2220656564 is about 47123.8428399043. The cubic root of 2220656564 is about 1304.6493411524.

The spelling of 2220656564 in words is "two billion, two hundred twenty million, six hundred fifty-six thousand, five hundred sixty-four".