138019842679 has 2 divisors, whose sum is σ = 138019842680. Its totient is φ = 138019842678.

The previous prime is 138019842671. The next prime is 138019842689. The reversal of 138019842679 is 976248910831.

138019842679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138019842679 - 2³ = 138019842671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138019842671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69009921339 + 69009921340.

It is an arithmetic number, because the mean of its divisors is an integer number (69009921340).

Almost surely, 2^138019842679 is an apocalyptic number.

138019842679 is a deficient number, since it is larger than the sum of its proper divisors (1).

138019842679 is an equidigital number, since it uses as much as digits as its factorization.

138019842679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5225472, while the sum is 58.

The spelling of 138019842679 in words is "one hundred thirty-eight billion, nineteen million, eight hundred forty-two thousand, six hundred seventy-nine".