6510656609 has 2 divisors, whose sum is σ = 6510656610. Its totient is φ = 6510656608.

The previous prime is 6510656597. The next prime is 6510656653. The reversal of 6510656609 is 9066560156.

It is an a-pointer prime, because the next prime (6510656653) can be obtained adding 6510656609 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6438457600 + 72199009 = 80240^2 + 8497^2 .

It is a cyclic number.

It is not a de Polignac number, because 6510656609 - 2⁸ = 6510656353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6510656609.

It is not a weakly prime, because it can be changed into another prime (6510656809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3255328304 + 3255328305.

It is an arithmetic number, because the mean of its divisors is an integer number (3255328305).

Almost surely, 2^6510656609 is an apocalyptic number.

It is an amenable number.

6510656609 is a deficient number, since it is larger than the sum of its proper divisors (1).

6510656609 is an equidigital number, since it uses as much as digits as its factorization.

6510656609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 291600, while the sum is 44.

The square root of 6510656609 is about 80688.6399005461. The cubic root of 6510656609 is about 1867.2749167295.

The spelling of 6510656609 in words is "six billion, five hundred ten million, six hundred fifty-six thousand, six hundred nine".