138873487565 has 8 divisors (see below), whose sum is σ = 166656618240. Its totient is φ = 111093167952.

The previous prime is 138873487549. The next prime is 138873487573. The reversal of 138873487565 is 565784378831.

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 138873487565 - 2⁴ = 138873487549 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 592505 + ... + 792974.

It is an arithmetic number, because the mean of its divisors is an integer number (20832077280).

Almost surely, 2^138873487565 is an apocalyptic number.

It is an amenable number.

138873487565 is a deficient number, since it is larger than the sum of its proper divisors (27783130675).

138873487565 is a wasteful number, since it uses less digits than its factorization.

138873487565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405531.

The product of its digits is 135475200, while the sum is 65.

The spelling of 138873487565 in words is "one hundred thirty-eight billion, eight hundred seventy-three million, four hundred eighty-seven thousand, five hundred sixty-five".