2219566644 has 48 divisors (see below), whose sum is σ = 5940067840. Its totient is φ = 715988160.

The previous prime is 2219566633. The next prime is 2219566663. The reversal of 2219566644 is 4466659122.

It is a self number, because there is not a number n which added to its sum of digits gives 2219566644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 328129 + ... + 334824.

Almost surely, 2^2219566644 is an apocalyptic number.

It is an amenable number.

2219566644 is an abundant number, since it is smaller than the sum of its proper divisors (3720501196).

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

2219566644 is a wasteful number, since it uses less digits than its factorization.

2219566644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662997 (or 662989 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 2219566644 is about 47112.2769986763. The cubic root of 2219566644 is about 1304.4358613293.

The spelling of 2219566644 in words is "two billion, two hundred nineteen million, five hundred sixty-six thousand, six hundred forty-four".