138613212365 has 8 divisors (see below), whose sum is σ = 166437474840. Its totient is φ = 110822823232.

The previous prime is 138613212281. The next prime is 138613212373. The reversal of 138613212365 is 563212316831.

138613212365 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 9857114089 + 128756098276 = 99283^2 + 358826^2 .

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-138613212365 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8459330 + ... + 8475699.

It is an arithmetic number, because the mean of its divisors is an integer number (20804684355).

Almost surely, 2^138613212365 is an apocalyptic number.

It is an amenable number.

138613212365 is a deficient number, since it is larger than the sum of its proper divisors (27824262475).

138613212365 is a wasteful number, since it uses less digits than its factorization.

138613212365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16936671.

The product of its digits is 155520, while the sum is 41.

The spelling of 138613212365 in words is "one hundred thirty-eight billion, six hundred thirteen million, two hundred twelve thousand, three hundred sixty-five".