63544644644536 has 256 divisors, whose sum is σ = 142840509765120. Its totient is φ = 26178121728000.

The previous prime is 63544644644443. The next prime is 63544644644557.

63544644644536 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 996574896 + ... + 996638656.

It is an arithmetic number, because the mean of its divisors is an integer number (557970741270).

Almost surely, 2^{63544644644536} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63544644644536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71420254882560).

63544644644536 is an abundant number, since it is smaller than the sum of its proper divisors (79295865120584).

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

63544644644536 is a wasteful number, since it uses less digits than its factorization.

63544644644536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64086 (or 64082 counting only the distinct ones).

The product of its digits is 1194393600, while the sum is 64.

The spelling of 63544644644536 in words is "sixty-three trillion, five hundred forty-four billion, six hundred forty-four million, six hundred forty-four thousand, five hundred thirty-six".