2564025641 has 4 divisors (see below), whose sum is σ = 2564492112. Its totient is φ = 2563559172.

The previous prime is 2564025619. The next prime is 2564025677. The reversal of 2564025641 is 1465204652.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2564025641 is a prime.

It is a Duffinian number.

2564025641 is a modest number, since divided by 25641 gives 2564 as remainder.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2564025601) 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, 224891 + ... + 236016.

It is an arithmetic number, because the mean of its divisors is an integer number (641123028).

Almost surely, 2^2564025641 is an apocalyptic number.

It is an amenable number.

2564025641 is a deficient number, since it is larger than the sum of its proper divisors (466471).

2564025641 is an equidigital number, since it uses as much as digits as its factorization.

2564025641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466470.

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 2564025641 is about 50636.2087937081. The cubic root of 2564025641 is about 1368.6974390247.

The spelling of 2564025641 in words is "two billion, five hundred sixty-four million, twenty-five thousand, six hundred forty-one".