63987678937 has 32 divisors (see below), whose sum is σ = 79553021184. Its totient is φ = 50114764800.

The previous prime is 63987678917. The next prime is 63987678943. The reversal of 63987678937 is 73987678936.

It is a cyclic number.

It is not a de Polignac number, because 63987678937 - 2⁷ = 63987678809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63987678937.

It is not an unprimeable number, because it can be changed into a prime (63987678917) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21040137 + ... + 21043177.

It is an arithmetic number, because the mean of its divisors is an integer number (2486031912).

Almost surely, 2^63987678937 is an apocalyptic number.

It is an amenable number.

63987678937 is a deficient number, since it is larger than the sum of its proper divisors (15565342247).

63987678937 is a wasteful number, since it uses less digits than its factorization.

63987678937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5329.

The product of its digits is 576108288, while the sum is 73.

Subtracting 63987678937 from its reverse (73987678936), we obtain a palindrome (9999999999).

The spelling of 63987678937 in words is "sixty-three billion, nine hundred eighty-seven million, six hundred seventy-eight thousand, nine hundred thirty-seven".