2563655 has 8 divisors (see below), whose sum is σ = 3091200. Its totient is φ = 2041056.

The previous prime is 2563643. The next prime is 2563657. The reversal of 2563655 is 5563652.

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

It is a cyclic number.

It is not a de Polignac number, because 2563655 - 2¹⁴ = 2547271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2563657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26 + ... + 2264.

It is an arithmetic number, because the mean of its divisors is an integer number (386400).

2^2563655 is an apocalyptic number.

2563655 is a deficient number, since it is larger than the sum of its proper divisors (527545).

2563655 is a wasteful number, since it uses less digits than its factorization.

2563655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2473.

The product of its digits is 27000, while the sum is 32.

The square root of 2563655 is about 1601.1417801057. The cubic root of 2563655 is about 136.8631485468.

The spelling of 2563655 in words is "two million, five hundred sixty-three thousand, six hundred fifty-five".