138133717809 has 8 divisors (see below), whose sum is σ = 184374855840. Its totient is φ = 91990862496.

The previous prime is 138133717789. The next prime is 138133717847. The reversal of 138133717809 is 908717331831.

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

It is not a de Polignac number, because 138133717809 - 2⁹ = 138133717297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138133717409) 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, 24567399 + ... + 24573020.

It is an arithmetic number, because the mean of its divisors is an integer number (23046856980).

Almost surely, 2^138133717809 is an apocalyptic number.

It is an amenable number.

138133717809 is a deficient number, since it is larger than the sum of its proper divisors (46241138031).

138133717809 is an equidigital number, since it uses as much as digits as its factorization.

138133717809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49141359.

The product of its (nonzero) digits is 762048, while the sum is 51.

The spelling of 138133717809 in words is "one hundred thirty-eight billion, one hundred thirty-three million, seven hundred seventeen thousand, eight hundred nine".