2644268416 has 32 divisors (see below), whose sum is σ = 5496922800. Its totient is φ = 1264648704.

The previous prime is 2644268413. The next prime is 2644268449. The reversal of 2644268416 is 6148624462.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2644268413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446151 + ... + 452038.

Almost surely, 2^2644268416 is an apocalyptic number.

It is an amenable number.

2644268416 is an abundant number, since it is smaller than the sum of its proper divisors (2852654384).

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

2644268416 is an equidigital number, since it uses as much as digits as its factorization.

2644268416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898226 (or 898214 counting only the distinct ones).

The product of its digits is 442368, while the sum is 43.

The square root of 2644268416 is about 51422.4505055914. The cubic root of 2644268416 is about 1382.8291075787.

The spelling of 2644268416 in words is "two billion, six hundred forty-four million, two hundred sixty-eight thousand, four hundred sixteen".