2564388849 has 8 divisors (see below), whose sum is σ = 3730020192. Its totient is φ = 1554175040.

The previous prime is 2564388791. The next prime is 2564388881. The reversal of 2564388849 is 9488834652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2564388849 - 2¹⁷ = 2564257777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2564388049) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 38854344 + ... + 38854409.

It is an arithmetic number, because the mean of its divisors is an integer number (466252524).

Almost surely, 2^2564388849 is an apocalyptic number.

It is an amenable number.

2564388849 is a deficient number, since it is larger than the sum of its proper divisors (1165631343).

2564388849 is a wasteful number, since it uses less digits than its factorization.

2564388849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77708767.

The product of its digits is 13271040, while the sum is 57.

The square root of 2564388849 is about 50639.7951121448. The cubic root of 2564388849 is about 1368.7620637539.

The spelling of 2564388849 in words is "two billion, five hundred sixty-four million, three hundred eighty-eight thousand, eight hundred forty-nine".