6544861 has 2 divisors, whose sum is σ = 6544862. Its totient is φ = 6544860.

The previous prime is 6544849. The next prime is 6544883. The reversal of 6544861 is 1684456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6095961 + 448900 = 2469^2 + 670^2 .

It is a cyclic number.

It is not a de Polignac number, because 6544861 - 2¹⁷ = 6413789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6544801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3272430 + 3272431.

It is an arithmetic number, because the mean of its divisors is an integer number (3272431).

Almost surely, 2^6544861 is an apocalyptic number.

It is an amenable number.

6544861 is a deficient number, since it is larger than the sum of its proper divisors (1).

6544861 is an equidigital number, since it uses as much as digits as its factorization.

6544861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 34.

The square root of 6544861 is about 2558.2925946811. The cubic root of 6544861 is about 187.0539179362.

The spelling of 6544861 in words is "six million, five hundred forty-four thousand, eight hundred sixty-one".