63563621361 has 4 divisors (see below), whose sum is σ = 84751495152. Its totient is φ = 42375747572.

The previous prime is 63563621327. The next prime is 63563621453. The reversal of 63563621361 is 16312636536.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63563621361 - 2¹¹ = 63563619313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63563621161) 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, 10593936891 + ... + 10593936896.

It is an arithmetic number, because the mean of its divisors is an integer number (21187873788).

Almost surely, 2^63563621361 is an apocalyptic number.

It is an amenable number.

63563621361 is a deficient number, since it is larger than the sum of its proper divisors (21187873791).

63563621361 is a wasteful number, since it uses less digits than its factorization.

63563621361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21187873790.

The product of its digits is 349920, while the sum is 42.

The spelling of 63563621361 in words is "sixty-three billion, five hundred sixty-three million, six hundred twenty-one thousand, three hundred sixty-one".