138865207711 has 2 divisors, whose sum is σ = 138865207712. Its totient is φ = 138865207710.

The previous prime is 138865207703. The next prime is 138865207729. The reversal of 138865207711 is 117702568831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138865207711 - 2³ = 138865207703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138865201711) 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, 69432603855 + 69432603856.

It is an arithmetic number, because the mean of its divisors is an integer number (69432603856).

Almost surely, 2^138865207711 is an apocalyptic number.

138865207711 is a deficient number, since it is larger than the sum of its proper divisors (1).

138865207711 is an equidigital number, since it uses as much as digits as its factorization.

138865207711 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 564480, while the sum is 49.

The spelling of 138865207711 in words is "one hundred thirty-eight billion, eight hundred sixty-five million, two hundred seven thousand, seven hundred eleven".