2564423245 has 4 divisors (see below), whose sum is σ = 3077307900. Its totient is φ = 2051538592.

The previous prime is 2564423219. The next prime is 2564423287. The reversal of 2564423245 is 5423244652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1103501961 + 1460921284 = 33219^2 + 38222^2 .

It is a cyclic number.

It is not a de Polignac number, because 2564423245 - 2⁹ = 2564422733 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256442320 + ... + 256442329.

It is an arithmetic number, because the mean of its divisors is an integer number (769326975).

Almost surely, 2^2564423245 is an apocalyptic number.

It is an amenable number.

2564423245 is a deficient number, since it is larger than the sum of its proper divisors (512884655).

2564423245 is an equidigital number, since it uses as much as digits as its factorization.

2564423245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512884654.

The product of its digits is 230400, while the sum is 37.

The square root of 2564423245 is about 50640.1347253342. The cubic root of 2564423245 is about 1368.7681834355.

Adding to 2564423245 its reverse (5423244652), we get a palindrome (7987667897).

The spelling of 2564423245 in words is "two billion, five hundred sixty-four million, four hundred twenty-three thousand, two hundred forty-five".