138157344325447 has 2 divisors, whose sum is σ = 138157344325448. Its totient is φ = 138157344325446.

The previous prime is 138157344325423. The next prime is 138157344325453. The reversal of 138157344325447 is 744523443751831.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138157344325447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138157344325457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69078672162723 + 69078672162724.

It is an arithmetic number, because the mean of its divisors is an integer number (69078672162724).

Almost surely, 2^{138157344325447} is an apocalyptic number.

138157344325447 is a deficient number, since it is larger than the sum of its proper divisors (1).

138157344325447 is an equidigital number, since it uses as much as digits as its factorization.

138157344325447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 135475200, while the sum is 61.

The spelling of 138157344325447 in words is "one hundred thirty-eight trillion, one hundred fifty-seven billion, three hundred forty-four million, three hundred twenty-five thousand, four hundred forty-seven".