2605852649 has 2 divisors, whose sum is σ = 2605852650. Its totient is φ = 2605852648.

The previous prime is 2605852609. The next prime is 2605852699. The reversal of 2605852649 is 9462585062.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2604571225 + 1281424 = 51035^2 + 1132^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2605852649 is a prime.

It is not a weakly prime, because it can be changed into another prime (2605852609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1302926324 + 1302926325.

It is an arithmetic number, because the mean of its divisors is an integer number (1302926325).

Almost surely, 2^2605852649 is an apocalyptic number.

It is an amenable number.

2605852649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2605852649 is an equidigital number, since it uses as much as digits as its factorization.

2605852649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 47.

The square root of 2605852649 is about 51047.5528208748. The cubic root of 2605852649 is about 1376.0998625088.

The spelling of 2605852649 in words is "two billion, six hundred five million, eight hundred fifty-two thousand, six hundred forty-nine".