63999882559872 has 384 divisors, whose sum is σ = 218339817696000. Its totient is φ = 18279932774400.

The previous prime is 63999882559867. The next prime is 63999882559897. The reversal of 63999882559872 is 27895528899936.

63999882559872 is a `hidden beast` number, since 6 + 3 + 9 + 9 + 9 + 8 + 8 + 2 + 5 + 598 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 718240122 + ... + 718329222.

It is an arithmetic number, because the mean of its divisors is an integer number (568593275250).

Almost surely, 2^{63999882559872} 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 63999882559872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109169908848000).

63999882559872 is an abundant number, since it is smaller than the sum of its proper divisors (154339935136128).

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

63999882559872 is an equidigital number, since it uses as much as digits as its factorization.

63999882559872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92436 (or 92412 counting only the distinct ones).

The product of its digits is 42326323200, while the sum is 90.

The spelling of 63999882559872 in words is "sixty-three trillion, nine hundred ninety-nine billion, eight hundred eighty-two million, five hundred fifty-nine thousand, eight hundred seventy-two".