2604466561 has 2 divisors, whose sum is σ = 2604466562. Its totient is φ = 2604466560.

The previous prime is 2604466547. The next prime is 2604466603. The reversal of 2604466561 is 1656644062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2576577600 + 27888961 = 50760^2 + 5281^2 .

It is a cyclic number.

It is not a de Polignac number, because 2604466561 - 2²⁵ = 2570912129 is a prime.

It is not a weakly prime, because it can be changed into another prime (2604466261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1302233280 + 1302233281.

It is an arithmetic number, because the mean of its divisors is an integer number (1302233281).

Almost surely, 2^2604466561 is an apocalyptic number.

It is an amenable number.

2604466561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2604466561 is an equidigital number, since it uses as much as digits as its factorization.

2604466561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 2604466561 is about 51033.9745757667. The cubic root of 2604466561 is about 1375.8558305734.

The spelling of 2604466561 in words is "two billion, six hundred four million, four hundred sixty-six thousand, five hundred sixty-one".