138215932511 has 2 divisors, whose sum is σ = 138215932512. Its totient is φ = 138215932510.

The previous prime is 138215932469. The next prime is 138215932513. The reversal of 138215932511 is 115239512831.

138215932511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138215932511 - 2³⁰ = 137142190687 is a prime.

Together with 138215932513, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138215932513) by changing a digit.

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 as a sum of consecutive naturals, namely, 69107966255 + 69107966256.

It is an arithmetic number, because the mean of its divisors is an integer number (69107966256).

Almost surely, 2^138215932511 is an apocalyptic number.

138215932511 is a deficient number, since it is larger than the sum of its proper divisors (1).

138215932511 is an equidigital number, since it uses as much as digits as its factorization.

138215932511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 41.

The spelling of 138215932511 in words is "one hundred thirty-eight billion, two hundred fifteen million, nine hundred thirty-two thousand, five hundred eleven".