8209563456 has 28 divisors (see below), whose sum is σ = 21721137152. Its totient is φ = 2736521088.

The previous prime is 8209563451. The next prime is 8209563473. The reversal of 8209563456 is 6543659028.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8209563451) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 21378880 + ... + 21379263.

Almost surely, 2^8209563456 is an apocalyptic number.

It is an amenable number.

8209563456 is an abundant number, since it is smaller than the sum of its proper divisors (13511573696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8209563456 is a wasteful number, since it uses less digits than its factorization.

8209563456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42758158 (or 42758148 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 48.

The square root of 8209563456 is about 90606.6413459852. The cubic root of 8209563456 is about 2017.3133134487.

The spelling of 8209563456 in words is "eight billion, two hundred nine million, five hundred sixty-three thousand, four hundred fifty-six".