138040404349 has 8 divisors (see below), whose sum is σ = 138438194400. Its totient is φ = 137642763216.

The previous prime is 138040404287. The next prime is 138040404361. The reversal of 138040404349 is 943404040831.

138040404349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138040404349 - 2³⁵ = 103680665981 is a prime.

It is a super-2 number, since 2×138040404349² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138080404349) 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 7 ways as a sum of consecutive naturals, for example, 1975002 + ... + 2043700.

It is an arithmetic number, because the mean of its divisors is an integer number (17304774300).

Almost surely, 2^138040404349 is an apocalyptic number.

It is an amenable number.

138040404349 is a deficient number, since it is larger than the sum of its proper divisors (397790051).

138040404349 is an equidigital number, since it uses as much as digits as its factorization.

138040404349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74459.

The product of its (nonzero) digits is 165888, while the sum is 40.

The spelling of 138040404349 in words is "one hundred thirty-eight billion, forty million, four hundred four thousand, three hundred forty-nine".