138823668611156 has 12 divisors (see below), whose sum is σ = 242943414647892. Its totient is φ = 69411264426048.

The previous prime is 138823668611093. The next prime is 138823668611213. The reversal of 138823668611156 is 651116866328831.

It can be written as a sum of positive squares in 2 ways, for example, as 59395290303556 + 79428378307600 = 7706834^2 + 8912260^2 .

It is a hoax number, since the sum of its digits (65) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 138823668611092 and 138823668611101.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 141921545 + ... + 142896368.

It is an arithmetic number, because the mean of its divisors is an integer number (20245284553991).

Almost surely, 2^{138823668611156} is an apocalyptic number.

It is an amenable number.

138823668611156 is a deficient number, since it is larger than the sum of its proper divisors (104119746036736).

138823668611156 is a wasteful number, since it uses less digits than its factorization.

138823668611156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284939770 (or 284939768 counting only the distinct ones).

The product of its digits is 59719680, while the sum is 65.

The spelling of 138823668611156 in words is "one hundred thirty-eight trillion, eight hundred twenty-three billion, six hundred sixty-eight million, six hundred eleven thousand, one hundred fifty-six".