138733545971 has 2 divisors, whose sum is σ = 138733545972. Its totient is φ = 138733545970.

The previous prime is 138733545953. The next prime is 138733546037. The reversal of 138733545971 is 179545337831.

It is a happy number.

138733545971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138733545971 - 2²² = 138729351667 is a prime.

It is not a weakly prime, because it can be changed into another prime (138733545901) 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, 69366772985 + 69366772986.

It is an arithmetic number, because the mean of its divisors is an integer number (69366772986).

Almost surely, 2^138733545971 is an apocalyptic number.

138733545971 is a deficient number, since it is larger than the sum of its proper divisors (1).

138733545971 is an equidigital number, since it uses as much as digits as its factorization.

138733545971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9525600, while the sum is 56.

The spelling of 138733545971 in words is "one hundred thirty-eight billion, seven hundred thirty-three million, five hundred forty-five thousand, nine hundred seventy-one".