63243805668 has 12 divisors (see below), whose sum is σ = 147568879920. Its totient is φ = 21081268552.

The previous prime is 63243805661. The next prime is 63243805699. The reversal of 63243805668 is 86650834236.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 63243805668.

It is not an unprimeable number, because it can be changed into a prime (63243805661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2635158558 + ... + 2635158581.

It is an arithmetic number, because the mean of its divisors is an integer number (12297406660).

Almost surely, 2^63243805668 is an apocalyptic number.

It is an amenable number.

63243805668 is an abundant number, since it is smaller than the sum of its proper divisors (84325074252).

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

63243805668 is a wasteful number, since it uses less digits than its factorization.

63243805668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5270317146 (or 5270317144 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 51.

The spelling of 63243805668 in words is "sixty-three billion, two hundred forty-three million, eight hundred five thousand, six hundred sixty-eight".