2564555239 has 2 divisors, whose sum is σ = 2564555240. Its totient is φ = 2564555238.

The previous prime is 2564555219. The next prime is 2564555249. The reversal of 2564555239 is 9325554652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2564555239 - 2¹¹ = 2564553191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2564555219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282277619 + 1282277620.

It is an arithmetic number, because the mean of its divisors is an integer number (1282277620).

Almost surely, 2^2564555239 is an apocalyptic number.

2564555239 is a deficient number, since it is larger than the sum of its proper divisors (1).

2564555239 is an equidigital number, since it uses as much as digits as its factorization.

2564555239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620000, while the sum is 46.

The square root of 2564555239 is about 50641.4379633912. The cubic root of 2564555239 is about 1368.7916670899.

The spelling of 2564555239 in words is "two billion, five hundred sixty-four million, five hundred fifty-five thousand, two hundred thirty-nine".