6338118638 has 4 divisors (see below), whose sum is σ = 9507177960. Its totient is φ = 3169059318.

The previous prime is 6338118637. The next prime is 6338118643. The reversal of 6338118638 is 8368118336.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 6338118592 and 6338118601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6338118637) 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 as a sum of consecutive naturals, namely, 1584529658 + ... + 1584529661.

It is an arithmetic number, because the mean of its divisors is an integer number (2376794490).

Almost surely, 2^6338118638 is an apocalyptic number.

6338118638 is a deficient number, since it is larger than the sum of its proper divisors (3169059322).

6338118638 is a wasteful number, since it uses less digits than its factorization.

6338118638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3169059321.

The product of its digits is 497664, while the sum is 47.

The square root of 6338118638 is about 79612.3020518814. The cubic root of 6338118638 is about 1850.6322297864.

The spelling of 6338118638 in words is "six billion, three hundred thirty-eight million, one hundred eighteen thousand, six hundred thirty-eight".