63544351562640 has 800 divisors, whose sum is σ = 238618658678400. Its totient is φ = 15579779604480.

The previous prime is 63544351562597. The next prime is 63544351562641. The reversal of 63544351562640 is 4626515344536.

63544351562640 is a `hidden beast` number, since 6 + 3 + 5 + 4 + 4 + 3 + 5 + 1 + 5 + 626 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (63544351562641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 27167314591 + ... + 27167316929.

It is an arithmetic number, because the mean of its divisors is an integer number (298273323348).

Almost surely, 2^{63544351562640} is an apocalyptic number.

63544351562640 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 63544351562640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119309329339200).

63544351562640 is an abundant number, since it is smaller than the sum of its proper divisors (175074307115760).

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

63544351562640 is a wasteful number, since it uses less digits than its factorization.

63544351562640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3517 (or 3502 counting only the distinct ones).

The product of its (nonzero) digits is 31104000, while the sum is 54.

The spelling of 63544351562640 in words is "sixty-three trillion, five hundred forty-four billion, three hundred fifty-one million, five hundred sixty-two thousand, six hundred forty".