2643163605 has 48 divisors (see below), whose sum is σ = 4727936304. Its totient is φ = 1365135360.

The previous prime is 2643163577. The next prime is 2643163613. The reversal of 2643163605 is 5063613462.

2643163605 is a `hidden beast` number, since 2 + 6 + 43 + 1 + 6 + 3 + 605 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 14243076 + 2628920529 = 3774^2 + 51273^2 .

It is not a de Polignac number, because 2643163605 - 2¹¹ = 2643161557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2643163605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 247537 + ... + 257993.

It is an arithmetic number, because the mean of its divisors is an integer number (98498673).

Almost surely, 2^2643163605 is an apocalyptic number.

It is an amenable number.

2643163605 is a deficient number, since it is larger than the sum of its proper divisors (2084772699).

2643163605 is a wasteful number, since it uses less digits than its factorization.

2643163605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10646 (or 10643 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 2643163605 is about 51411.7068866615. The cubic root of 2643163605 is about 1382.6364925346.

The spelling of 2643163605 in words is "two billion, six hundred forty-three million, one hundred sixty-three thousand, six hundred five".