2644008668 has 24 divisors (see below), whose sum is σ = 5387794272. Its totient is φ = 1111765824.

The previous prime is 2644008617. The next prime is 2644008671. The reversal of 2644008668 is 8668004462.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 889355 + ... + 892322.

It is an arithmetic number, because the mean of its divisors is an integer number (224491428).

Almost surely, 2^2644008668 is an apocalyptic number.

2644008668 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2644008668 is an abundant number, since it is smaller than the sum of its proper divisors (2743785604).

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

2644008668 is a wasteful number, since it uses less digits than its factorization.

2644008668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781741 (or 1781739 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 44.

The square root of 2644008668 is about 51419.9248151920. The cubic root of 2644008668 is about 1382.7838273978.

The spelling of 2644008668 in words is "two billion, six hundred forty-four million, eight thousand, six hundred sixty-eight".