138133401338 has 8 divisors (see below), whose sum is σ = 207339260340. Its totient is φ = 69020314560.

The previous prime is 138133401337. The next prime is 138133401359. The reversal of 138133401338 is 833104331831.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 114966430489 + 23166970849 = 339067^2 + 152207^2 .

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 (138133401331) 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, 23189333 + ... + 23195288.

Almost surely, 2^138133401338 is an apocalyptic number.

138133401338 is a deficient number, since it is larger than the sum of its proper divisors (69205859002).

138133401338 is a wasteful number, since it uses less digits than its factorization.

138133401338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46386112.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 138133401338 in words is "one hundred thirty-eight billion, one hundred thirty-three million, four hundred one thousand, three hundred thirty-eight".