2564425291 has 2 divisors, whose sum is σ = 2564425292. Its totient is φ = 2564425290.

The previous prime is 2564425289. The next prime is 2564425301. The reversal of 2564425291 is 1925244652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2564425291 - 2¹ = 2564425289 is a prime.

Together with 2564425289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2564422291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282212645 + 1282212646.

It is an arithmetic number, because the mean of its divisors is an integer number (1282212646).

Almost surely, 2^2564425291 is an apocalyptic number.

2564425291 is a deficient number, since it is larger than the sum of its proper divisors (1).

2564425291 is an equidigital number, since it uses as much as digits as its factorization.

2564425291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 40.

The square root of 2564425291 is about 50640.1549266982. The cubic root of 2564425291 is about 1368.7685474548.

The spelling of 2564425291 in words is "two billion, five hundred sixty-four million, four hundred twenty-five thousand, two hundred ninety-one".