138509344241 has 8 divisors (see below), whose sum is σ = 138760205760. Its totient is φ = 138258607312.

The previous prime is 138509344219. The next prime is 138509344247. The reversal of 138509344241 is 142443905831.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138509344241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138509344192 and 138509344201.

It is not an unprimeable number, because it can be changed into a prime (138509344247) 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, 2358551 + ... + 2416563.

It is an arithmetic number, because the mean of its divisors is an integer number (17345025720).

Almost surely, 2^138509344241 is an apocalyptic number.

It is an amenable number.

138509344241 is a deficient number, since it is larger than the sum of its proper divisors (250861519).

138509344241 is an equidigital number, since it uses as much as digits as its factorization.

138509344241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62295.

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 138509344241 in words is "one hundred thirty-eight billion, five hundred nine million, three hundred forty-four thousand, two hundred forty-one".