2564384387 has 4 divisors (see below), whose sum is σ = 2647106496. Its totient is φ = 2481662280.

The previous prime is 2564384357. The next prime is 2564384413. The reversal of 2564384387 is 7834834652.

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 2564384387 - 2²⁰ = 2563335811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2564384327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41361008 + ... + 41361069.

It is an arithmetic number, because the mean of its divisors is an integer number (661776624).

Almost surely, 2^2564384387 is an apocalyptic number.

2564384387 is a deficient number, since it is larger than the sum of its proper divisors (82722109).

2564384387 is an equidigital number, since it uses as much as digits as its factorization.

2564384387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82722108.

The product of its digits is 3870720, while the sum is 50.

The square root of 2564384387 is about 50639.7510558652. The cubic root of 2564384387 is about 1368.7612698779.

The spelling of 2564384387 in words is "two billion, five hundred sixty-four million, three hundred eighty-four thousand, three hundred eighty-seven".