138297209185 has 8 divisors (see below), whose sum is σ = 165958684416. Its totient is φ = 110636411760.

The previous prime is 138297209129. The next prime is 138297209209. The reversal of 138297209185 is 581902792831.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-138297209185 is a prime.

It is a super-2 number, since 2×138297209185² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 584002 + ... + 785908.

It is an arithmetic number, because the mean of its divisors is an integer number (20744835552).

Almost surely, 2^138297209185 is an apocalyptic number.

It is an amenable number.

138297209185 is a deficient number, since it is larger than the sum of its proper divisors (27661475231).

138297209185 is a wasteful number, since it uses less digits than its factorization.

138297209185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338903.

The product of its (nonzero) digits is 2177280, while the sum is 55.

The spelling of 138297209185 in words is "one hundred thirty-eight billion, two hundred ninety-seven million, two hundred nine thousand, one hundred eighty-five".