2646563 has 8 divisors (see below), whose sum is σ = 2780160. Its totient is φ = 2516040.

The previous prime is 2646551. The next prime is 2646571. The reversal of 2646563 is 3656462.

Added to its reverse (3656462) it gives a triangular number (6303025 = T₃₅₅₀).

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 2646563 - 2¹⁴ = 2630179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2646533) 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, 1106 + ... + 2552.

It is an arithmetic number, because the mean of its divisors is an integer number (347520).

2^2646563 is an apocalyptic number.

2646563 is a deficient number, since it is larger than the sum of its proper divisors (133597).

2646563 is a wasteful number, since it uses less digits than its factorization.

2646563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537.

The product of its digits is 25920, while the sum is 32.

The square root of 2646563 is about 1626.8260509348. The cubic root of 2646563 is about 138.3228978757.

Adding to 2646563 its reverse (3656462), we get a triangular number (6303025 = T₃₅₅₀).

The spelling of 2646563 in words is "two million, six hundred forty-six thousand, five hundred sixty-three".