138678043111 has 2 divisors, whose sum is σ = 138678043112. Its totient is φ = 138678043110.

The previous prime is 138678043061. The next prime is 138678043121. The reversal of 138678043111 is 111340876831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138678043111 - 2¹⁵ = 138678010343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138678043121) by changing a digit.

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 as a sum of consecutive naturals, namely, 69339021555 + 69339021556.

It is an arithmetic number, because the mean of its divisors is an integer number (69339021556).

Almost surely, 2^138678043111 is an apocalyptic number.

138678043111 is a deficient number, since it is larger than the sum of its proper divisors (1).

138678043111 is an equidigital number, since it uses as much as digits as its factorization.

138678043111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 138678043111 in words is "one hundred thirty-eight billion, six hundred seventy-eight million, forty-three thousand, one hundred eleven".