2564320647 has 16 divisors (see below), whose sum is σ = 4137391872. Its totient is φ = 1379130240.

The previous prime is 2564320637. The next prime is 2564320657. The reversal of 2564320647 is 7460234652.

2564320647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2564320637) and next prime (2564320657).

It is not a de Polignac number, because 2564320647 - 2⁸ = 2564320391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564320637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3591129 + ... + 3591842.

It is an arithmetic number, because the mean of its divisors is an integer number (258586992).

Almost surely, 2^2564320647 is an apocalyptic number.

2564320647 is a deficient number, since it is larger than the sum of its proper divisors (1573071225).

2564320647 is a wasteful number, since it uses less digits than its factorization.

2564320647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7182998.

The product of its (nonzero) digits is 241920, while the sum is 39.

The square root of 2564320647 is about 50639.1217044688. The cubic root of 2564320647 is about 1368.7499292008.

The spelling of 2564320647 in words is "two billion, five hundred sixty-four million, three hundred twenty thousand, six hundred forty-seven".