138672326365 has 8 divisors (see below), whose sum is σ = 166654056888. Its totient is φ = 110773017600.

The previous prime is 138672326279. The next prime is 138672326371. The reversal of 138672326365 is 563623276831.

It can be written as a sum of positive squares in 4 ways, for example, as 4004611524 + 134667714841 = 63282^2 + 366971^2 .

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

It is not a de Polignac number, because 138672326365 - 2¹⁹ = 138671802077 is a prime.

It is a super-2 number, since 2×138672326365² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 20601736 + ... + 20608465.

It is an arithmetic number, because the mean of its divisors is an integer number (20831757111).

Almost surely, 2^138672326365 is an apocalyptic number.

It is an amenable number.

138672326365 is a deficient number, since it is larger than the sum of its proper divisors (27981730523).

138672326365 is an equidigital number, since it uses as much as digits as its factorization.

138672326365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41210879.

The product of its digits is 6531840, while the sum is 52.

The spelling of 138672326365 in words is "one hundred thirty-eight billion, six hundred seventy-two million, three hundred twenty-six thousand, three hundred sixty-five".