6644452263 has 16 divisors (see below), whose sum is σ = 8969276160. Its totient is φ = 4374748224.

The previous prime is 6644452259. The next prime is 6644452277. The reversal of 6644452263 is 3622544466.

6644452263 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6644452263 - 2² = 6644452259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6644052263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221670 + ... + 249852.

It is an arithmetic number, because the mean of its divisors is an integer number (560579760).

Almost surely, 2^6644452263 is an apocalyptic number.

6644452263 is a deficient number, since it is larger than the sum of its proper divisors (2324823897).

6644452263 is a wasteful number, since it uses less digits than its factorization.

6644452263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29158.

The product of its digits is 829440, while the sum is 42.

The square root of 6644452263 is about 81513.5096962461. The cubic root of 6644452263 is about 1879.9792761221.

The spelling of 6644452263 in words is "six billion, six hundred forty-four million, four hundred fifty-two thousand, two hundred sixty-three".