138437340901 has 4 divisors (see below), whose sum is σ = 138439328704. Its totient is φ = 138435353100.

The previous prime is 138437340773. The next prime is 138437340997. The reversal of 138437340901 is 109043734831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 138437340901 - 2⁷ = 138437340773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138437440901) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 885495 + ... + 1030036.

It is an arithmetic number, because the mean of its divisors is an integer number (34609832176).

Almost surely, 2^138437340901 is an apocalyptic number.

It is an amenable number.

138437340901 is a deficient number, since it is larger than the sum of its proper divisors (1987803).

138437340901 is an equidigital number, since it uses as much as digits as its factorization.

138437340901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987802.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 138437340901 in words is "one hundred thirty-eight billion, four hundred thirty-seven million, three hundred forty thousand, nine hundred one".