6541610609 has 2 divisors, whose sum is σ = 6541610610. Its totient is φ = 6541610608.

The previous prime is 6541610549. The next prime is 6541610611. The reversal of 6541610609 is 9060161456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3407290384 + 3134320225 = 58372^2 + 55985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6541610609 is a prime.

It is a Sophie Germain prime.

Together with 6541610611, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6541610209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3270805304 + 3270805305.

It is an arithmetic number, because the mean of its divisors is an integer number (3270805305).

Almost surely, 2^6541610609 is an apocalyptic number.

It is an amenable number.

6541610609 is a deficient number, since it is larger than the sum of its proper divisors (1).

6541610609 is an equidigital number, since it uses as much as digits as its factorization.

6541610609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 6541610609 is about 80880.2238436566. The cubic root of 6541610609 is about 1870.2294712061.

The spelling of 6541610609 in words is "six billion, five hundred forty-one million, six hundred ten thousand, six hundred nine".