63601221663 has 12 divisors (see below), whose sum is σ = 104992493008. Its totient is φ = 36343555200.

The previous prime is 63601221659. The next prime is 63601221721. The reversal of 63601221663 is 36612210636.

63601221663 is a `hidden beast` number, since 636 + 0 + 1 + 2 + 2 + 16 + 6 + 3 = 666.

It is not a de Polignac number, because 63601221663 - 2² = 63601221659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63601221643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 504771538 + ... + 504771663.

Almost surely, 2^63601221663 is an apocalyptic number.

63601221663 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

63601221663 is a deficient number, since it is larger than the sum of its proper divisors (41391271345).

63601221663 is a wasteful number, since it uses less digits than its factorization.

63601221663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009543214 (or 1009543211 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The spelling of 63601221663 in words is "sixty-three billion, six hundred one million, two hundred twenty-one thousand, six hundred sixty-three".