2564768695 has 4 divisors (see below), whose sum is σ = 3077722440. Its totient is φ = 2051814952.

The previous prime is 2564768659. The next prime is 2564768719. The reversal of 2564768695 is 5968674652.

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

It is a cyclic number.

It is not a de Polignac number, because 2564768695 - 2¹¹ = 2564766647 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, 256476865 + ... + 256476874.

It is an arithmetic number, because the mean of its divisors is an integer number (769430610).

Almost surely, 2^2564768695 is an apocalyptic number.

2564768695 is a deficient number, since it is larger than the sum of its proper divisors (512953745).

2564768695 is an equidigital number, since it uses as much as digits as its factorization.

2564768695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512953744.

The product of its digits is 21772800, while the sum is 58.

The square root of 2564768695 is about 50643.5454426327. The cubic root of 2564768695 is about 1368.8296423151.

The spelling of 2564768695 in words is "two billion, five hundred sixty-four million, seven hundred sixty-eight thousand, six hundred ninety-five".