6368561 has 4 divisors (see below), whose sum is σ = 6375012. Its totient is φ = 6362112.

The previous prime is 6368521. The next prime is 6368581. The reversal of 6368561 is 1658636.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4494400 + 1874161 = 2120^2 + 1369^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6368561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6368501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1400 + ... + 3833.

It is an arithmetic number, because the mean of its divisors is an integer number (1593753).

Almost surely, 2^6368561 is an apocalyptic number.

It is an amenable number.

6368561 is a deficient number, since it is larger than the sum of its proper divisors (6451).

6368561 is a wasteful number, since it uses less digits than its factorization.

6368561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6450.

The product of its digits is 25920, while the sum is 35.

The square root of 6368561 is about 2523.6008004437. The cubic root of 6368561 is about 185.3590397751.

The spelling of 6368561 in words is "six million, three hundred sixty-eight thousand, five hundred sixty-one".