2604663643 has 2 divisors, whose sum is σ = 2604663644. Its totient is φ = 2604663642.

The previous prime is 2604663631. The next prime is 2604663661. The reversal of 2604663643 is 3463664062.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2604663643 - 2²⁹ = 2067792731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2604663596 and 2604663605.

It is not a weakly prime, because it can be changed into another prime (2604661643) 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, 1302331821 + 1302331822.

It is an arithmetic number, because the mean of its divisors is an integer number (1302331822).

Almost surely, 2^2604663643 is an apocalyptic number.

2604663643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2604663643 is an equidigital number, since it uses as much as digits as its factorization.

2604663643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 40.

The square root of 2604663643 is about 51035.9054294131. The cubic root of 2604663643 is about 1375.8905337232.

The spelling of 2604663643 in words is "two billion, six hundred four million, six hundred sixty-three thousand, six hundred forty-three".