2564751568 has 20 divisors (see below), whose sum is σ = 4977957060. Its totient is φ = 1280117504.

The previous prime is 2564751557. The next prime is 2564751569. The reversal of 2564751568 is 8651574652.

It can be written as a sum of positive squares in 2 ways, for example, as 1473638544 + 1091113024 = 38388^2 + 33032^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564751569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131755 + ... + 149962.

It is an arithmetic number, because the mean of its divisors is an integer number (248897853).

Almost surely, 2^2564751568 is an apocalyptic number.

It is an amenable number.

2564751568 is a deficient number, since it is larger than the sum of its proper divisors (2413205492).

2564751568 is a wasteful number, since it uses less digits than its factorization.

2564751568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282294 (or 282288 counting only the distinct ones).

The product of its digits is 2016000, while the sum is 49.

The square root of 2564751568 is about 50643.3763487388. The cubic root of 2564751568 is about 1368.8265953870.

The spelling of 2564751568 in words is "two billion, five hundred sixty-four million, seven hundred fifty-one thousand, five hundred sixty-eight".