138818826187 has 2 divisors, whose sum is σ = 138818826188. Its totient is φ = 138818826186.

The previous prime is 138818826163. The next prime is 138818826227. The reversal of 138818826187 is 781628818831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138818826187 - 2¹⁹ = 138818301899 is a prime.

It is not a weakly prime, because it can be changed into another prime (138818827187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69409413093 + 69409413094.

It is an arithmetic number, because the mean of its divisors is an integer number (69409413094).

Almost surely, 2^138818826187 is an apocalyptic number.

138818826187 is a deficient number, since it is larger than the sum of its proper divisors (1).

138818826187 is an equidigital number, since it uses as much as digits as its factorization.

138818826187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8257536, while the sum is 61.

The spelling of 138818826187 in words is "one hundred thirty-eight billion, eight hundred eighteen million, eight hundred twenty-six thousand, one hundred eighty-seven".