138681650015 has 8 divisors (see below), whose sum is σ = 166515367680. Its totient is φ = 110880394912.

The previous prime is 138681649979. The next prime is 138681650039. The reversal of 138681650015 is 510056186831.

It is a happy number.

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 138681650015 - 2¹⁰ = 138681648991 is a prime.

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, 8106239 + ... + 8123328.

It is an arithmetic number, because the mean of its divisors is an integer number (20814420960).

Almost surely, 2^138681650015 is an apocalyptic number.

138681650015 is a deficient number, since it is larger than the sum of its proper divisors (27833717665).

138681650015 is a wasteful number, since it uses less digits than its factorization.

138681650015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16231281.

The product of its (nonzero) digits is 172800, while the sum is 44.

The spelling of 138681650015 in words is "one hundred thirty-eight billion, six hundred eighty-one million, six hundred fifty thousand, fifteen".