138791381579 has 2 divisors, whose sum is σ = 138791381580. Its totient is φ = 138791381578.

The previous prime is 138791381569. The next prime is 138791381669. The reversal of 138791381579 is 975183197831.

It is a weak prime.

It is an emirp because it is prime and its reverse (975183197831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138791381579 - 2¹⁶ = 138791316043 is a prime.

It is not a weakly prime, because it can be changed into another prime (138791381569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69395690789 + 69395690790.

It is an arithmetic number, because the mean of its divisors is an integer number (69395690790).

Almost surely, 2^138791381579 is an apocalyptic number.

138791381579 is a deficient number, since it is larger than the sum of its proper divisors (1).

138791381579 is an equidigital number, since it uses as much as digits as its factorization.

138791381579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11430720, while the sum is 62.

The spelling of 138791381579 in words is "one hundred thirty-eight billion, seven hundred ninety-one million, three hundred eighty-one thousand, five hundred seventy-nine".