138225604129 has 2 divisors, whose sum is σ = 138225604130. Its totient is φ = 138225604128.

The previous prime is 138225604123. The next prime is 138225604163. The reversal of 138225604129 is 921406522831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131135964129 + 7089640000 = 362127^2 + 84200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138225604129 is a prime.

It is not a weakly prime, because it can be changed into another prime (138225604123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69112802064 + 69112802065.

It is an arithmetic number, because the mean of its divisors is an integer number (69112802065).

Almost surely, 2^138225604129 is an apocalyptic number.

It is an amenable number.

138225604129 is a deficient number, since it is larger than the sum of its proper divisors (1).

138225604129 is an equidigital number, since it uses as much as digits as its factorization.

138225604129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 138225604129 in words is "one hundred thirty-eight billion, two hundred twenty-five million, six hundred four thousand, one hundred twenty-nine".