2564521567 has 2 divisors, whose sum is σ = 2564521568. Its totient is φ = 2564521566.

The previous prime is 2564521529. The next prime is 2564521571. The reversal of 2564521567 is 7651254652.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2564521567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2564521507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282260783 + 1282260784.

It is an arithmetic number, because the mean of its divisors is an integer number (1282260784).

Almost surely, 2^2564521567 is an apocalyptic number.

2564521567 is a deficient number, since it is larger than the sum of its proper divisors (1).

2564521567 is an equidigital number, since it uses as much as digits as its factorization.

2564521567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504000, while the sum is 43.

The square root of 2564521567 is about 50641.1055072853. The cubic root of 2564521567 is about 1368.7856764274.

The spelling of 2564521567 in words is "two billion, five hundred sixty-four million, five hundred twenty-one thousand, five hundred sixty-seven".