2643565063 has 4 divisors (see below), whose sum is σ = 2644647840. Its totient is φ = 2642482288.

The previous prime is 2643565061. The next prime is 2643565091. The reversal of 2643565063 is 3605653462.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2643565063 - 2¹ = 2643565061 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2643565061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537718 + ... + 542611.

It is an arithmetic number, because the mean of its divisors is an integer number (661161960).

Almost surely, 2^2643565063 is an apocalyptic number.

2643565063 is a deficient number, since it is larger than the sum of its proper divisors (1082777).

2643565063 is a wasteful number, since it uses less digits than its factorization.

2643565063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082776.

The product of its (nonzero) digits is 388800, while the sum is 40.

The square root of 2643565063 is about 51415.6110826274. The cubic root of 2643565063 is about 1382.7064897632.

The spelling of 2643565063 in words is "two billion, six hundred forty-three million, five hundred sixty-five thousand, sixty-three".