138644347258 has 8 divisors (see below), whose sum is σ = 208147207680. Its totient is φ = 69261944700.

The previous prime is 138644347201. The next prime is 138644347267. The reversal of 138644347258 is 852743446831.

138644347258 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 138644347199 and 138644347208.

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 3 ways as a sum of consecutive naturals, for example, 30111588 + ... + 30116191.

It is an arithmetic number, because the mean of its divisors is an integer number (26018400960).

Almost surely, 2^138644347258 is an apocalyptic number.

138644347258 is a deficient number, since it is larger than the sum of its proper divisors (69502860422).

138644347258 is a wasteful number, since it uses less digits than its factorization.

138644347258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60228932.

The product of its digits is 15482880, while the sum is 55.

The spelling of 138644347258 in words is "one hundred thirty-eight billion, six hundred forty-four million, three hundred forty-seven thousand, two hundred fifty-eight".