63786635138 has 8 divisors (see below), whose sum is σ = 95681041788. Its totient is φ = 31892954544.

The previous prime is 63786635093. The next prime is 63786635141. The reversal of 63786635138 is 83153668736.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 62338604329 + 1448030809 = 249677^2 + 38053^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191120 + ... + 405092.

Almost surely, 2^63786635138 is an apocalyptic number.

63786635138 is a deficient number, since it is larger than the sum of its proper divisors (31894406650).

63786635138 is a wasteful number, since it uses less digits than its factorization.

63786635138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363028.

The product of its digits is 13063680, while the sum is 56.

The spelling of 63786635138 in words is "sixty-three billion, seven hundred eighty-six million, six hundred thirty-five thousand, one hundred thirty-eight".