2564656476 has 12 divisors (see below), whose sum is σ = 5984198472. Its totient is φ = 854885488.

The previous prime is 2564656459. The next prime is 2564656487. The reversal of 2564656476 is 6746564652.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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, 106860675 + ... + 106860698.

It is an arithmetic number, because the mean of its divisors is an integer number (498683206).

Almost surely, 2^2564656476 is an apocalyptic number.

It is an amenable number.

2564656476 is an abundant number, since it is smaller than the sum of its proper divisors (3419541996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2564656476 is a wasteful number, since it uses less digits than its factorization.

2564656476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213721380 (or 213721378 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 51.

The square root of 2564656476 is about 50642.4375005785. The cubic root of 2564656476 is about 1368.8096780802.

The spelling of 2564656476 in words is "two billion, five hundred sixty-four million, six hundred fifty-six thousand, four hundred seventy-six".