6563461646 has 16 divisors (see below), whose sum is σ = 11252688480. Its totient is φ = 2812652160.

The previous prime is 6563461637. The next prime is 6563461651. The reversal of 6563461646 is 6461643656.

It is a self number, because there is not a number n which added to its sum of digits gives 6563461646.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281690 + ... + 304098.

It is an arithmetic number, because the mean of its divisors is an integer number (703293030).

Almost surely, 2^6563461646 is an apocalyptic number.

6563461646 is a deficient number, since it is larger than the sum of its proper divisors (4689226834).

6563461646 is a wasteful number, since it uses less digits than its factorization.

6563461646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43339.

The product of its digits is 1866240, while the sum is 47.

The square root of 6563461646 is about 81015.1939206468. The cubic root of 6563461646 is about 1872.3095417879.

The spelling of 6563461646 in words is "six billion, five hundred sixty-three million, four hundred sixty-one thousand, six hundred forty-six".