63563921018 has 32 divisors (see below), whose sum is σ = 103424670720. Its totient is φ = 29125103040.

The previous prime is 63563920999. The next prime is 63563921021. The reversal of 63563921018 is 81012936536.

It is a self number, because there is not a number n which added to its sum of digits gives 63563921018.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2515121 + ... + 2540267.

It is an arithmetic number, because the mean of its divisors is an integer number (3232020960).

Almost surely, 2^63563921018 is an apocalyptic number.

63563921018 is a deficient number, since it is larger than the sum of its proper divisors (39860749702).

63563921018 is a wasteful number, since it uses less digits than its factorization.

63563921018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25862.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 63563921018 in words is "sixty-three billion, five hundred sixty-three million, nine hundred twenty-one thousand, eighteen".