138805338271 has 2 divisors, whose sum is σ = 138805338272. Its totient is φ = 138805338270.

The previous prime is 138805338253. The next prime is 138805338313. The reversal of 138805338271 is 172833508831.

It is a weak prime.

It is an emirp because it is prime and its reverse (172833508831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138805338271 - 2¹⁵ = 138805305503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138805338671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69402669135 + 69402669136.

It is an arithmetic number, because the mean of its divisors is an integer number (69402669136).

Almost surely, 2^138805338271 is an apocalyptic number.

138805338271 is a deficient number, since it is larger than the sum of its proper divisors (1).

138805338271 is an equidigital number, since it uses as much as digits as its factorization.

138805338271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 138805338271 in words is "one hundred thirty-eight billion, eight hundred five million, three hundred thirty-eight thousand, two hundred seventy-one".