63938117568 has 224 divisors, whose sum is σ = 184084504576. Its totient is φ = 19469279232.

The previous prime is 63938117491. The next prime is 63938117587. The reversal of 63938117568 is 86571183936.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 174218121 + ... + 174218487.

It is an arithmetic number, because the mean of its divisors is an integer number (821805824).

Almost surely, 2^63938117568 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 63938117568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92042252288).

63938117568 is an abundant number, since it is smaller than the sum of its proper divisors (120146387008).

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

63938117568 is a wasteful number, since it uses less digits than its factorization.

63938117568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931 (or 921 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 57.

The spelling of 63938117568 in words is "sixty-three billion, nine hundred thirty-eight million, one hundred seventeen thousand, five hundred sixty-eight".