6438045338 has 8 divisors (see below), whose sum is σ = 9657541332. Its totient is φ = 3218864896.

The previous prime is 6438045331. The next prime is 6438045353. The reversal of 6438045338 is 8335408346.

It can be written as a sum of positive squares in 2 ways, for example, as 6437976169 + 69169 = 80237^2 + 263^2 .

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

It is not an unprimeable number, because it can be changed into a prime (6438045331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18695 + ... + 115002.

Almost surely, 2^6438045338 is an apocalyptic number.

6438045338 is a deficient number, since it is larger than the sum of its proper divisors (3219495994).

6438045338 is a wasteful number, since it uses less digits than its factorization.

6438045338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157776.

The product of its (nonzero) digits is 829440, while the sum is 44.

The square root of 6438045338 is about 80237.4310281679. The cubic root of 6438045338 is about 1860.3072427669.

The spelling of 6438045338 in words is "six billion, four hundred thirty-eight million, forty-five thousand, three hundred thirty-eight".