138958403543 has 2 divisors, whose sum is σ = 138958403544. Its totient is φ = 138958403542.

The previous prime is 138958403533. The next prime is 138958403599. The reversal of 138958403543 is 345304859831.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138958403543 - 2¹⁰ = 138958402519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138958403513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69479201771 + 69479201772.

It is an arithmetic number, because the mean of its divisors is an integer number (69479201772).

Almost surely, 2^138958403543 is an apocalyptic number.

138958403543 is a deficient number, since it is larger than the sum of its proper divisors (1).

138958403543 is an equidigital number, since it uses as much as digits as its factorization.

138958403543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6220800, while the sum is 53.

The spelling of 138958403543 in words is "one hundred thirty-eight billion, nine hundred fifty-eight million, four hundred three thousand, five hundred forty-three".