63716605644 has 24 divisors (see below), whose sum is σ = 148677646320. Its totient is φ = 21238073344.

The previous prime is 63716605643. The next prime is 63716605679. The reversal of 63716605644 is 44650661736.

It is a junction number, because it is equal to n+sod(n) for n = 63716605593 and 63716605602.

It is not an unprimeable number, because it can be changed into a prime (63716605643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298012 + ... + 465020.

It is an arithmetic number, because the mean of its divisors is an integer number (6194901930).

Almost surely, 2^63716605644 is an apocalyptic number.

It is an amenable number.

63716605644 is an abundant number, since it is smaller than the sum of its proper divisors (84961040676).

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

63716605644 is a wasteful number, since it uses less digits than its factorization.

63716605644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198809 (or 198807 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 48.

The spelling of 63716605644 in words is "sixty-three billion, seven hundred sixteen million, six hundred five thousand, six hundred forty-four".