6644790468 has 18 divisors (see below), whose sum is σ = 16796553774. Its totient is φ = 2214930144.

The previous prime is 6644790437. The next prime is 6644790491. The reversal of 6644790468 is 8640974466.

It can be written as a sum of positive squares in only one way, i.e., 6490235844 + 154554624 = 80562^2 + 12432^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 92288721 + ... + 92288792.

Almost surely, 2^6644790468 is an apocalyptic number.

It is an amenable number.

6644790468 is an abundant number, since it is smaller than the sum of its proper divisors (10151763306).

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

6644790468 is a wasteful number, since it uses less digits than its factorization.

6644790468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184577523 (or 184577518 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 54.

The square root of 6644790468 is about 81515.5842032675. The cubic root of 6644790468 is about 1880.0111727871.

The spelling of 6644790468 in words is "six billion, six hundred forty-four million, seven hundred ninety thousand, four hundred sixty-eight".