138830825449 has 4 divisors (see below), whose sum is σ = 138881330500. Its totient is φ = 138780320400.

The previous prime is 138830825423. The next prime is 138830825467. The reversal of 138830825449 is 944528038831.

138830825449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5006553049 + 133824272400 = 70757^2 + 365820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138830825449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138830825449.

It is not an unprimeable number, because it can be changed into a prime (138830828449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25248402 + ... + 25253899.

It is an arithmetic number, because the mean of its divisors is an integer number (34720332625).

Almost surely, 2^138830825449 is an apocalyptic number.

It is an amenable number.

138830825449 is a deficient number, since it is larger than the sum of its proper divisors (50505051).

138830825449 is an equidigital number, since it uses as much as digits as its factorization.

138830825449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50505050.

The product of its (nonzero) digits is 6635520, while the sum is 55.

The spelling of 138830825449 in words is "one hundred thirty-eight billion, eight hundred thirty million, eight hundred twenty-five thousand, four hundred forty-nine".