63644541030720 has 448 divisors, whose sum is σ = 248329871274240. Its totient is φ = 15242932740096.

The previous prime is 63644541030709. The next prime is 63644541030737. The reversal of 63644541030720 is 2703014544636.

63644541030720 is a `hidden beast` number, since 6 + 3 + 6 + 4 + 4 + 541 + 0 + 30 + 72 + 0 = 666.

It is a super-2 number, since 2×63644541030720² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 3501402 + ... + 11813081.

It is an arithmetic number, because the mean of its divisors is an integer number (554307748380).

Almost surely, 2^{63644541030720} is an apocalyptic number.

63644541030720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63644541030720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124164935637120).

63644541030720 is an abundant number, since it is smaller than the sum of its proper divisors (184685330243520).

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

63644541030720 is a wasteful number, since it uses less digits than its factorization.

63644541030720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15314559 (or 15314543 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 45.

The spelling of 63644541030720 in words is "sixty-three trillion, six hundred forty-four billion, five hundred forty-one million, thirty thousand, seven hundred twenty".