138223850729 has 16 divisors (see below), whose sum is σ = 143587520640. Its totient is φ = 132988840320.

The previous prime is 138223850663. The next prime is 138223850731. The reversal of 138223850729 is 927058322831.

It is a cyclic number.

It is not a de Polignac number, because 138223850729 - 2²⁴ = 138207073513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138223859729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 453467 + ... + 694319.

It is an arithmetic number, because the mean of its divisors is an integer number (8974220040).

Almost surely, 2^138223850729 is an apocalyptic number.

It is an amenable number.

138223850729 is a deficient number, since it is larger than the sum of its proper divisors (5363669911).

138223850729 is a wasteful number, since it uses less digits than its factorization.

138223850729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241120.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 138223850729 in words is "one hundred thirty-eight billion, two hundred twenty-three million, eight hundred fifty thousand, seven hundred twenty-nine".