138316154739877 has 2 divisors, whose sum is σ = 138316154739878. Its totient is φ = 138316154739876.

The previous prime is 138316154739827. The next prime is 138316154739887. The reversal of 138316154739877 is 778937451613831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78030262908676 + 60285891831201 = 8833474^2 + 7764399^2 .

It is an emirp because it is prime and its reverse (778937451613831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138316154739877 - 2²³ = 138316146351269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138316154739827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69158077369938 + 69158077369939.

It is an arithmetic number, because the mean of its divisors is an integer number (69158077369939).

Almost surely, 2^{138316154739877} is an apocalyptic number.

It is an amenable number.

138316154739877 is a deficient number, since it is larger than the sum of its proper divisors (1).

138316154739877 is an equidigital number, since it uses as much as digits as its factorization.

138316154739877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 640120320, while the sum is 73.

The spelling of 138316154739877 in words is "one hundred thirty-eight trillion, three hundred sixteen billion, one hundred fifty-four million, seven hundred thirty-nine thousand, eight hundred seventy-seven".