138544862013401 has 2 divisors, whose sum is σ = 138544862013402. Its totient is φ = 138544862013400.

The previous prime is 138544862013301. The next prime is 138544862013403. The reversal of 138544862013401 is 104310268445831.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136564582627225 + 1980279386176 = 11686085^2 + 1407224^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138544862013401 is a prime.

Together with 138544862013403, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138544862013401.

It is not a weakly prime, because it can be changed into another prime (138544862013403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69272431006700 + 69272431006701.

It is an arithmetic number, because the mean of its divisors is an integer number (69272431006701).

Almost surely, 2^{138544862013401} is an apocalyptic number.

It is an amenable number.

138544862013401 is a deficient number, since it is larger than the sum of its proper divisors (1).

138544862013401 is an equidigital number, since it uses as much as digits as its factorization.

138544862013401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2211840, while the sum is 50.

The spelling of 138544862013401 in words is "one hundred thirty-eight trillion, five hundred forty-four billion, eight hundred sixty-two million, thirteen thousand, four hundred one".