138002717865 has 8 divisors (see below), whose sum is σ = 220804348608. Its totient is φ = 73601449520.

The previous prime is 138002717863. The next prime is 138002717873. The reversal of 138002717865 is 568717200831.

It is a happy number.

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

It is not a de Polignac number, because 138002717865 - 2¹ = 138002717863 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138002717863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4600090581 + ... + 4600090610.

It is an arithmetic number, because the mean of its divisors is an integer number (27600543576).

Almost surely, 2^138002717865 is an apocalyptic number.

138002717865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138002717865 is a deficient number, since it is larger than the sum of its proper divisors (82801630743).

138002717865 is an equidigital number, since it uses as much as digits as its factorization.

138002717865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9200181199.

The product of its (nonzero) digits is 564480, while the sum is 48.

The spelling of 138002717865 in words is "one hundred thirty-eight billion, two million, seven hundred seventeen thousand, eight hundred sixty-five".