138265291543 has 2 divisors, whose sum is σ = 138265291544. Its totient is φ = 138265291542.

The previous prime is 138265291537. The next prime is 138265291589. The reversal of 138265291543 is 345192562831.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138265291543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138265291523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69132645771 + 69132645772.

It is an arithmetic number, because the mean of its divisors is an integer number (69132645772).

Almost surely, 2^138265291543 is an apocalyptic number.

138265291543 is a deficient number, since it is larger than the sum of its proper divisors (1).

138265291543 is an equidigital number, since it uses as much as digits as its factorization.

138265291543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1555200, while the sum is 49.

The spelling of 138265291543 in words is "one hundred thirty-eight billion, two hundred sixty-five million, two hundred ninety-one thousand, five hundred forty-three".