138025144409 has 2 divisors, whose sum is σ = 138025144410. Its totient is φ = 138025144408.

The previous prime is 138025144351. The next prime is 138025144421. The reversal of 138025144409 is 904441520831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127540408384 + 10484736025 = 357128^2 + 102395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138025144409 is a prime.

It is not a weakly prime, because it can be changed into another prime (138025144429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69012572204 + 69012572205.

It is an arithmetic number, because the mean of its divisors is an integer number (69012572205).

Almost surely, 2^138025144409 is an apocalyptic number.

It is an amenable number.

138025144409 is a deficient number, since it is larger than the sum of its proper divisors (1).

138025144409 is an equidigital number, since it uses as much as digits as its factorization.

138025144409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 138025144409 in words is "one hundred thirty-eight billion, twenty-five million, one hundred forty-four thousand, four hundred nine".