2217644464 has 80 divisors (see below), whose sum is σ = 4999680000. Its totient is φ = 933304320.

The previous prime is 2217644423. The next prime is 2217644479. The reversal of 2217644464 is 4644467122.

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, 1774912 + ... + 1776160.

It is an arithmetic number, because the mean of its divisors is an integer number (62496000).

Almost surely, 2^2217644464 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 2217644464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2499840000).

2217644464 is an abundant number, since it is smaller than the sum of its proper divisors (2782035536).

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

2217644464 is a wasteful number, since it uses less digits than its factorization.

2217644464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1538 (or 1532 counting only the distinct ones).

The product of its digits is 258048, while the sum is 40.

The square root of 2217644464 is about 47091.8725896518. The cubic root of 2217644464 is about 1304.0591985119.

The spelling of 2217644464 in words is "two billion, two hundred seventeen million, six hundred forty-four thousand, four hundred sixty-four".