2604866609 has 2 divisors, whose sum is σ = 2604866610. Its totient is φ = 2604866608.

The previous prime is 2604866573. The next prime is 2604866629. The reversal of 2604866609 is 9066684062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2521546225 + 83320384 = 50215^2 + 9128^2 .

It is a cyclic number.

It is not a de Polignac number, because 2604866609 - 2⁸ = 2604866353 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2604866629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1302433304 + 1302433305.

It is an arithmetic number, because the mean of its divisors is an integer number (1302433305).

Almost surely, 2^2604866609 is an apocalyptic number.

It is an amenable number.

2604866609 is a deficient number, since it is larger than the sum of its proper divisors (1).

2604866609 is an equidigital number, since it uses as much as digits as its factorization.

2604866609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 47.

The square root of 2604866609 is about 51037.8938534889. The cubic root of 2604866609 is about 1375.9262711264.

The spelling of 2604866609 in words is "two billion, six hundred four million, eight hundred sixty-six thousand, six hundred nine".