2564372509 has 2 divisors, whose sum is σ = 2564372510. Its totient is φ = 2564372508.

The previous prime is 2564372501. The next prime is 2564372537. The reversal of 2564372509 is 9052734652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2543184900 + 21187609 = 50430^2 + 4603^2 .

It is a cyclic number.

It is not a de Polignac number, because 2564372509 - 2³ = 2564372501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2564372501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282186254 + 1282186255.

It is an arithmetic number, because the mean of its divisors is an integer number (1282186255).

Almost surely, 2^2564372509 is an apocalyptic number.

It is an amenable number.

2564372509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2564372509 is an equidigital number, since it uses as much as digits as its factorization.

2564372509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 43.

The square root of 2564372509 is about 50639.6337763219. The cubic root of 2564372509 is about 1368.7591565479.

The spelling of 2564372509 in words is "two billion, five hundred sixty-four million, three hundred seventy-two thousand, five hundred nine".