63987405838 has 16 divisors (see below), whose sum is σ = 102416760720. Its totient is φ = 29894619456.

The previous prime is 63987405817. The next prime is 63987405863. The reversal of 63987405838 is 83850478936.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11530645 + ... + 11536192.

It is an arithmetic number, because the mean of its divisors is an integer number (6401047545).

Almost surely, 2^63987405838 is an apocalyptic number.

63987405838 is a deficient number, since it is larger than the sum of its proper divisors (38429354882).

63987405838 is a wasteful number, since it uses less digits than its factorization.

63987405838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23066931.

The product of its (nonzero) digits is 34836480, while the sum is 61.

The spelling of 63987405838 in words is "sixty-three billion, nine hundred eighty-seven million, four hundred five thousand, eight hundred thirty-eight".