138268775082271 has 2 divisors, whose sum is σ = 138268775082272. Its totient is φ = 138268775082270.

The previous prime is 138268775082253. The next prime is 138268775082329. The reversal of 138268775082271 is 172280577862831.

It is a weak prime.

It is an emirp because it is prime and its reverse (172280577862831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138268775082271 - 2²³ = 138268766693663 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138268775082197 and 138268775082206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138268775082671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69134387541135 + 69134387541136.

It is an arithmetic number, because the mean of its divisors is an integer number (69134387541136).

Almost surely, 2^{138268775082271} is an apocalyptic number.

138268775082271 is a deficient number, since it is larger than the sum of its proper divisors (1).

138268775082271 is an equidigital number, since it uses as much as digits as its factorization.

138268775082271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126443520, while the sum is 67.

The spelling of 138268775082271 in words is "one hundred thirty-eight trillion, two hundred sixty-eight billion, seven hundred seventy-five million, eighty-two thousand, two hundred seventy-one".