2217664944 has 120 divisors (see below), whose sum is σ = 6782257872. Its totient is φ = 670863360.

The previous prime is 2217664937. The next prime is 2217664951. The reversal of 2217664944 is 4494667122.

It is an interprime number because it is at equal distance from previous prime (2217664937) and next prime (2217664951).

2217664944 is a modest number, since divided by 64944 gives 22176 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 2217664944.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1546852 + ... + 1548284.

Almost surely, 2^2217664944 is an apocalyptic number.

2217664944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2217664944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3391128936).

2217664944 is an abundant number, since it is smaller than the sum of its proper divisors (4564592928).

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

2217664944 is a wasteful number, since it uses less digits than its factorization.

2217664944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2435 (or 2426 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 2217664944 is about 47092.0900364382. The cubic root of 2217664944 is about 1304.0632128389.

The spelling of 2217664944 in words is "two billion, two hundred seventeen million, six hundred sixty-four thousand, nine hundred forty-four".