63971817936 has 80 divisors (see below), whose sum is σ = 179735162880. Its totient is φ = 19488729600.

The previous prime is 63971817859. The next prime is 63971817937.

63971817936 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 63971817936.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63971817937) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 444496 + ... + 570543.

It is an arithmetic number, because the mean of its divisors is an integer number (2246689536).

Almost surely, 2^63971817936 is an apocalyptic number.

It is an amenable number.

63971817936 is an abundant number, since it is smaller than the sum of its proper divisors (115763344944).

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

63971817936 is a wasteful number, since it uses less digits than its factorization.

63971817936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015164 (or 1015158 counting only the distinct ones).

The product of its digits is 10287648, while the sum is 60.

The spelling of 63971817936 in words is "sixty-three billion, nine hundred seventy-one million, eight hundred seventeen thousand, nine hundred thirty-six".