2564408045 has 4 divisors (see below), whose sum is σ = 3077289660. Its totient is φ = 2051526432.

The previous prime is 2564408029. The next prime is 2564408051. The reversal of 2564408045 is 5408044652.

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 332223529 + 2232184516 = 18227^2 + 47246^2 .

It is a cyclic number.

It is not a de Polignac number, because 2564408045 - 2⁴ = 2564408029 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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256440800 + ... + 256440809.

It is an arithmetic number, because the mean of its divisors is an integer number (769322415).

Almost surely, 2^2564408045 is an apocalyptic number.

It is an amenable number.

2564408045 is a deficient number, since it is larger than the sum of its proper divisors (512881615).

2564408045 is an equidigital number, since it uses as much as digits as its factorization.

2564408045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512881614.

The product of its (nonzero) digits is 153600, while the sum is 38.

The square root of 2564408045 is about 50639.9846465222. The cubic root of 2564408045 is about 1368.7654790824.

The spelling of 2564408045 in words is "two billion, five hundred sixty-four million, four hundred eight thousand, forty-five".