138366251218565 has 8 divisors (see below), whose sum is σ = 166039571923488. Its totient is φ = 110692954000720.

The previous prime is 138366251218537. The next prime is 138366251218579. The reversal of 138366251218565 is 565812152663831.

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

It is not a de Polignac number, because 138366251218565 - 2¹² = 138366251214469 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138366251218498 and 138366251218507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12076070 + ... + 20556360.

It is an arithmetic number, because the mean of its divisors is an integer number (20754946490436).

Almost surely, 2^{138366251218565} is an apocalyptic number.

It is an amenable number.

138366251218565 is a deficient number, since it is larger than the sum of its proper divisors (27673320704923).

138366251218565 is an equidigital number, since it uses as much as digits as its factorization.

138366251218565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11743539.

The product of its digits is 62208000, while the sum is 62.

The spelling of 138366251218565 in words is "one hundred thirty-eight trillion, three hundred sixty-six billion, two hundred fifty-one million, two hundred eighteen thousand, five hundred sixty-five".