63989773848 has 960 divisors, whose sum is σ = 259663773600. Its totient is φ = 14422302720.

The previous prime is 63989773777. The next prime is 63989773867. The reversal of 63989773848 is 84837798936.

63989773848 is a `hidden beast` number, since 6 + 398 + 97 + 73 + 84 + 8 = 666.

63989773848 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

Its product of digits (438939648) is a multiple of the sum of its prime divisors (882).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 77188698 + ... + 77189526.

Almost surely, 2^63989773848 is an apocalyptic number.

63989773848 is a gapful number since it is divisible by the number (68) 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 63989773848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129831886800).

63989773848 is an abundant number, since it is smaller than the sum of its proper divisors (195673999752).

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

63989773848 is a wasteful number, since it uses less digits than its factorization.

63989773848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902 (or 882 counting only the distinct ones).

The product of its digits is 438939648, while the sum is 72.

The spelling of 63989773848 in words is "sixty-three billion, nine hundred eighty-nine million, seven hundred seventy-three thousand, eight hundred forty-eight".