2564518789 has 4 divisors (see below), whose sum is σ = 2930878624. Its totient is φ = 2198158956.

The previous prime is 2564518769. The next prime is 2564518829. The reversal of 2564518789 is 9878154652.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2564518789 - 2⁵ = 2564518757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564518709) 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 in 3 ways as a sum of consecutive naturals, for example, 183179907 + ... + 183179920.

It is an arithmetic number, because the mean of its divisors is an integer number (732719656).

Almost surely, 2^2564518789 is an apocalyptic number.

It is an amenable number.

2564518789 is a deficient number, since it is larger than the sum of its proper divisors (366359835).

2564518789 is an equidigital number, since it uses as much as digits as its factorization.

2564518789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366359834.

The product of its digits is 4838400, while the sum is 55.

The square root of 2564518789 is about 50641.0780789667. The cubic root of 2564518789 is about 1368.7851821847.

The spelling of 2564518789 in words is "two billion, five hundred sixty-four million, five hundred eighteen thousand, seven hundred eighty-nine".