138440771038441 has 2 divisors, whose sum is σ = 138440771038442. Its totient is φ = 138440771038440.

The previous prime is 138440771038411. The next prime is 138440771038457. The reversal of 138440771038441 is 144830177044831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99836966504025 + 38603804534416 = 9991845^2 + 6213196^2 .

It is a cyclic number.

It is not a de Polignac number, because 138440771038441 - 2⁷ = 138440771038313 is a prime.

It is not a weakly prime, because it can be changed into another prime (138440771038411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69220385519220 + 69220385519221.

It is an arithmetic number, because the mean of its divisors is an integer number (69220385519221).

Almost surely, 2^{138440771038441} is an apocalyptic number.

It is an amenable number.

138440771038441 is a deficient number, since it is larger than the sum of its proper divisors (1).

138440771038441 is an equidigital number, since it uses as much as digits as its factorization.

138440771038441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7225344, while the sum is 55.

The spelling of 138440771038441 in words is "one hundred thirty-eight trillion, four hundred forty billion, seven hundred seventy-one million, thirty-eight thousand, four hundred forty-one".