2563564 has 6 divisors (see below), whose sum is σ = 4486244. Its totient is φ = 1281780.

The previous prime is 2563553. The next prime is 2563601. The reversal of 2563564 is 4653652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320442 + ... + 320449.

2^2563564 is an apocalyptic number.

It is an amenable number.

2563564 is a deficient number, since it is larger than the sum of its proper divisors (1922680).

2563564 is a wasteful number, since it uses less digits than its factorization.

2563564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640895 (or 640893 counting only the distinct ones).

The product of its digits is 21600, while the sum is 31.

The square root of 2563564 is about 1601.1133626324. The cubic root of 2563564 is about 136.8615291539.

The spelling of 2563564 in words is "two million, five hundred sixty-three thousand, five hundred sixty-four".