138398068841 has 8 divisors (see below), whose sum is σ = 147438147744. Its totient is φ = 129457880640.

The previous prime is 138398068799. The next prime is 138398068847. The reversal of 138398068841 is 148860893831.

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 138398068841 - 2²² = 138393874537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138398068847) 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, 24969815 + ... + 24975356.

It is an arithmetic number, because the mean of its divisors is an integer number (18429768468).

Almost surely, 2^138398068841 is an apocalyptic number.

It is an amenable number.

138398068841 is a deficient number, since it is larger than the sum of its proper divisors (9040078903).

138398068841 is a wasteful number, since it uses less digits than its factorization.

138398068841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49945351.

The product of its (nonzero) digits is 7962624, while the sum is 59.

The spelling of 138398068841 in words is "one hundred thirty-eight billion, three hundred ninety-eight million, sixty-eight thousand, eight hundred forty-one".