2564184856 has 8 divisors (see below), whose sum is σ = 4807846620. Its totient is φ = 1282092424.

The previous prime is 2564184829. The next prime is 2564184893. The reversal of 2564184856 is 6584814652.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160261546 + ... + 160261561.

Almost surely, 2^2564184856 is an apocalyptic number.

It is an amenable number.

2564184856 is a deficient number, since it is larger than the sum of its proper divisors (2243661764).

2564184856 is a wasteful number, since it uses less digits than its factorization.

2564184856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320523113 (or 320523109 counting only the distinct ones).

The product of its digits is 1843200, while the sum is 49.

The square root of 2564184856 is about 50637.7809150441. The cubic root of 2564184856 is about 1368.7257685194.

The spelling of 2564184856 in words is "two billion, five hundred sixty-four million, one hundred eighty-four thousand, eight hundred fifty-six".