6561344 has 28 divisors (see below), whose sum is σ = 13123164. Its totient is φ = 3254784.

The previous prime is 6561319. The next prime is 6561383. The reversal of 6561344 is 4431656.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1721344 + 4840000 = 1312^2 + 2200^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9722 + ... + 10374.

Almost surely, 2^6561344 is an apocalyptic number.

6561344 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6561344 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

6561344 is a wasteful number, since it uses less digits than its factorization.

6561344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822 (or 812 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 6561344 is about 2561.5120534559. The cubic root of 6561344 is about 187.2108158457.

The spelling of 6561344 in words is "six million, five hundred sixty-one thousand, three hundred forty-four".