2564530145 has 4 divisors (see below), whose sum is σ = 3077436180. Its totient is φ = 2051624112.

The previous prime is 2564530127. The next prime is 2564530151. The reversal of 2564530145 is 5410354652.

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 729864256 + 1834665889 = 27016^2 + 42833^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2564530145 is a prime.

It is a super-2 number, since 2×2564530145² = 13153629729227442050, which contains 22 as substring.

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, 256453010 + ... + 256453019.

It is an arithmetic number, because the mean of its divisors is an integer number (769359045).

Almost surely, 2^2564530145 is an apocalyptic number.

It is an amenable number.

2564530145 is a deficient number, since it is larger than the sum of its proper divisors (512906035).

2564530145 is an equidigital number, since it uses as much as digits as its factorization.

2564530145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512906034.

The product of its (nonzero) digits is 72000, while the sum is 35.

The square root of 2564530145 is about 50641.1902012581. The cubic root of 2564530145 is about 1368.7872025640.

Adding to 2564530145 its reverse (5410354652), we get a palindrome (7974884797).

The spelling of 2564530145 in words is "two billion, five hundred sixty-four million, five hundred thirty thousand, one hundred forty-five".