138659505441285 has 16 divisors (see below), whose sum is σ = 221938083334656. Its totient is φ = 73924111359168.

The previous prime is 138659505441271. The next prime is 138659505441337. The reversal of 138659505441285 is 582144505956831.

It is a happy number.

It is not a de Polignac number, because 138659505441285 - 2¹¹ = 138659505439237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1726513269 + ... + 1726593578.

It is an arithmetic number, because the mean of its divisors is an integer number (13871130208416).

Almost surely, 2^{138659505441285} is an apocalyptic number.

138659505441285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138659505441285 is a deficient number, since it is larger than the sum of its proper divisors (83278577893371).

138659505441285 is a wasteful number, since it uses less digits than its factorization.

138659505441285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3453109532.

The product of its (nonzero) digits is 207360000, while the sum is 66.

The spelling of 138659505441285 in words is "one hundred thirty-eight trillion, six hundred fifty-nine billion, five hundred five million, four hundred forty-one thousand, two hundred eighty-five".