2564368645 has 16 divisors (see below), whose sum is σ = 3251093760. Its totient is φ = 1938604864.

The previous prime is 2564368637. The next prime is 2564368663. The reversal of 2564368645 is 5468634652.

It is not a de Polignac number, because 2564368645 - 2³ = 2564368637 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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181327 + ... + 194956.

It is an arithmetic number, because the mean of its divisors is an integer number (203193360).

Almost surely, 2^2564368645 is an apocalyptic number.

It is an amenable number.

2564368645 is a deficient number, since it is larger than the sum of its proper divisors (686725115).

2564368645 is a wasteful number, since it uses less digits than its factorization.

2564368645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376364.

The product of its digits is 4147200, while the sum is 49.

The square root of 2564368645 is about 50639.5956243728. The cubic root of 2564368645 is about 1368.7584690649.

The spelling of 2564368645 in words is "two billion, five hundred sixty-four million, three hundred sixty-eight thousand, six hundred forty-five".