138758653821329 has 2 divisors, whose sum is σ = 138758653821330. Its totient is φ = 138758653821328.

The previous prime is 138758653821301. The next prime is 138758653821409. The reversal of 138758653821329 is 923128356857831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107765472430225 + 30993181391104 = 10381015^2 + 5567152^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138758653821329 is a prime.

It is not a weakly prime, because it can be changed into another prime (138758653221329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69379326910664 + 69379326910665.

It is an arithmetic number, because the mean of its divisors is an integer number (69379326910665).

Almost surely, 2^{138758653821329} is an apocalyptic number.

It is an amenable number.

138758653821329 is a deficient number, since it is larger than the sum of its proper divisors (1).

138758653821329 is an equidigital number, since it uses as much as digits as its factorization.

138758653821329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 522547200, while the sum is 71.

The spelling of 138758653821329 in words is "one hundred thirty-eight trillion, seven hundred fifty-eight billion, six hundred fifty-three million, eight hundred twenty-one thousand, three hundred twenty-nine".