138869071826 has 8 divisors (see below), whose sum is σ = 208305255420. Its totient is φ = 69433986688.

The previous prime is 138869071819. The next prime is 138869071837. The reversal of 138869071826 is 628170968831.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 118690585225 + 20178486601 = 344515^2 + 142051^2 .

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, 218630 + ... + 570558.

Almost surely, 2^138869071826 is an apocalyptic number.

138869071826 is a deficient number, since it is larger than the sum of its proper divisors (69436183594).

138869071826 is a wasteful number, since it uses less digits than its factorization.

138869071826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549228.

The product of its (nonzero) digits is 6967296, while the sum is 59.

The spelling of 138869071826 in words is "one hundred thirty-eight billion, eight hundred sixty-nine million, seventy-one thousand, eight hundred twenty-six".