2644426064 has 20 divisors (see below), whose sum is σ = 5855515104. Its totient is φ = 1133325408.

The previous prime is 2644426051. The next prime is 2644426069. The reversal of 2644426064 is 4606244462.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2644426069) 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, 11805362 + ... + 11805585.

Almost surely, 2^2644426064 is an apocalyptic number.

It is an amenable number.

2644426064 is an abundant number, since it is smaller than the sum of its proper divisors (3211089040).

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

2644426064 is a wasteful number, since it uses less digits than its factorization.

2644426064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23610962 (or 23610956 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 38.

The square root of 2644426064 is about 51423.9833540732. The cubic root of 2644426064 is about 1382.8565878841.

The spelling of 2644426064 in words is "two billion, six hundred forty-four million, four hundred twenty-six thousand, sixty-four".