6938662138 has 8 divisors (see below), whose sum is σ = 10408422132. Its totient is φ = 3469188096.

The previous prime is 6938662111. The next prime is 6938662169. The reversal of 6938662138 is 8312668396.

It can be written as a sum of positive squares in 2 ways, for example, as 3942960849 + 2995701289 = 62793^2 + 54733^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 5956 + ... + 117952.

Almost surely, 2^6938662138 is an apocalyptic number.

6938662138 is a deficient number, since it is larger than the sum of its proper divisors (3469759994).

6938662138 is a wasteful number, since it uses less digits than its factorization.

6938662138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142976.

The product of its digits is 2239488, while the sum is 52.

The square root of 6938662138 is about 83298.6322696838. The cubic root of 6938662138 is about 1907.3273968002.

The spelling of 6938662138 in words is "six billion, nine hundred thirty-eight million, six hundred sixty-two thousand, one hundred thirty-eight".