138383370587321 has 4 divisors (see below), whose sum is σ = 138683551435044. Its totient is φ = 138083189739600.

The previous prime is 138383370587303. The next prime is 138383370587327. The reversal of 138383370587321 is 123785073383831.

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 25438254013225 + 112945116574096 = 5043635^2 + 10627564^2 .

It is a cyclic number.

It is not a de Polignac number, because 138383370587321 - 2¹⁴ = 138383370570937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138383370587327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150090423170 + ... + 150090424091.

It is an arithmetic number, because the mean of its divisors is an integer number (34670887858761).

Almost surely, 2^{138383370587321} is an apocalyptic number.

It is an amenable number.

138383370587321 is a deficient number, since it is larger than the sum of its proper divisors (300180847723).

138383370587321 is an equidigital number, since it uses as much as digits as its factorization.

138383370587321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300180847722.

The product of its (nonzero) digits is 60963840, while the sum is 62.

The spelling of 138383370587321 in words is "one hundred thirty-eight trillion, three hundred eighty-three billion, three hundred seventy million, five hundred eighty-seven thousand, three hundred twenty-one".