138786268860172 has 24 divisors (see below), whose sum is σ = 243118419131952. Its totient is φ = 69323864913600.

The previous prime is 138786268860149. The next prime is 138786268860179. The reversal of 138786268860172 is 271068862687831.

It is a junction number, because it is equal to n+sod(n) for n = 138786268860095 and 138786268860104.

It is not an unprimeable number, because it can be changed into a prime (138786268860179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 603353422 + ... + 603583402.

It is an arithmetic number, because the mean of its divisors is an integer number (10129934130498).

Almost surely, 2^{138786268860172} is an apocalyptic number.

It is an amenable number.

138786268860172 is a deficient number, since it is larger than the sum of its proper divisors (104332150271780).

138786268860172 is a wasteful number, since it uses less digits than its factorization.

138786268860172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379929 (or 379927 counting only the distinct ones).

The product of its (nonzero) digits is 520224768, while the sum is 73.

The spelling of 138786268860172 in words is "one hundred thirty-eight trillion, seven hundred eighty-six billion, two hundred sixty-eight million, eight hundred sixty thousand, one hundred seventy-two".