138655808141 has 2 divisors, whose sum is σ = 138655808142. Its totient is φ = 138655808140.

The previous prime is 138655808129. The next prime is 138655808183. The reversal of 138655808141 is 141808556831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137874829225 + 780978916 = 371315^2 + 27946^2 .

It is an emirp because it is prime and its reverse (141808556831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138655808141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138655808141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138655808741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69327904070 + 69327904071.

It is an arithmetic number, because the mean of its divisors is an integer number (69327904071).

Almost surely, 2^138655808141 is an apocalyptic number.

It is an amenable number.

138655808141 is a deficient number, since it is larger than the sum of its proper divisors (1).

138655808141 is an equidigital number, since it uses as much as digits as its factorization.

138655808141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 921600, while the sum is 50.

The spelling of 138655808141 in words is "one hundred thirty-eight billion, six hundred fifty-five million, eight hundred eight thousand, one hundred forty-one".