2604504561 has 8 divisors (see below), whose sum is σ = 3476253024. Its totient is φ = 1734546240.

The previous prime is 2604504493. The next prime is 2604504571. The reversal of 2604504561 is 1654054062.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2604504561 - 2¹⁰ = 2604503537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2604504571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444136 + ... + 449961.

It is an arithmetic number, because the mean of its divisors is an integer number (434531628).

Almost surely, 2^2604504561 is an apocalyptic number.

It is an amenable number.

2604504561 is a deficient number, since it is larger than the sum of its proper divisors (871748463).

2604504561 is an equidigital number, since it uses as much as digits as its factorization.

2604504561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895071.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 2604504561 is about 51034.3468754132. The cubic root of 2604504561 is about 1375.8625219330.

The spelling of 2604504561 in words is "two billion, six hundred four million, five hundred four thousand, five hundred sixty-one".