2656564 has 6 divisors (see below), whose sum is σ = 4648994. Its totient is φ = 1328280.

The previous prime is 2656553. The next prime is 2656601. The reversal of 2656564 is 4656562.

It can be written as a sum of positive squares in only one way, i.e., 1464100 + 1192464 = 1210^2 + 1092^2 .

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, 332067 + ... + 332074.

2^2656564 is an apocalyptic number.

It is an amenable number.

2656564 is a deficient number, since it is larger than the sum of its proper divisors (1992430).

2656564 is a wasteful number, since it uses less digits than its factorization.

2656564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664145 (or 664143 counting only the distinct ones).

The product of its digits is 43200, while the sum is 34.

The square root of 2656564 is about 1629.8969292566. The cubic root of 2656564 is about 138.4969133103.

The spelling of 2656564 in words is "two million, six hundred fifty-six thousand, five hundred sixty-four".