2564340887 has 2 divisors, whose sum is σ = 2564340888. Its totient is φ = 2564340886.

The previous prime is 2564340853. The next prime is 2564340899. The reversal of 2564340887 is 7880434652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2564340887 - 2¹⁸ = 2564078743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2564340787) 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, 1282170443 + 1282170444.

It is an arithmetic number, because the mean of its divisors is an integer number (1282170444).

Almost surely, 2^2564340887 is an apocalyptic number.

2564340887 is a deficient number, since it is larger than the sum of its proper divisors (1).

2564340887 is an equidigital number, since it uses as much as digits as its factorization.

2564340887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1290240, while the sum is 47.

The square root of 2564340887 is about 50639.3215495626. The cubic root of 2564340887 is about 1368.7535303399.

The spelling of 2564340887 in words is "two billion, five hundred sixty-four million, three hundred forty thousand, eight hundred eighty-seven".