6644913453 has 24 divisors (see below), whose sum is σ = 10338350880. Its totient is φ = 4099183200.

The previous prime is 6644913433. The next prime is 6644913547. The reversal of 6644913453 is 3543194466.

6644913453 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 6644913453 - 2⁵ = 6644913421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6644913399 and 6644913408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6644913433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 444498 + ... + 459203.

It is an arithmetic number, because the mean of its divisors is an integer number (430764620).

Almost surely, 2^6644913453 is an apocalyptic number.

It is an amenable number.

6644913453 is a deficient number, since it is larger than the sum of its proper divisors (3693437427).

6644913453 is a wasteful number, since it uses less digits than its factorization.

6644913453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903769 (or 903766 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

The square root of 6644913453 is about 81516.3385647319. The cubic root of 6644913453 is about 1880.0227714346.

The spelling of 6644913453 in words is "six billion, six hundred forty-four million, nine hundred thirteen thousand, four hundred fifty-three".