138843272563 has 2 divisors, whose sum is σ = 138843272564. Its totient is φ = 138843272562.

The previous prime is 138843272543. The next prime is 138843272651. The reversal of 138843272563 is 365272348831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138843272563 - 2⁵ = 138843272531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138843272563.

It is not a weakly prime, because it can be changed into another prime (138843272543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69421636281 + 69421636282.

It is an arithmetic number, because the mean of its divisors is an integer number (69421636282).

Almost surely, 2^138843272563 is an apocalyptic number.

138843272563 is a deficient number, since it is larger than the sum of its proper divisors (1).

138843272563 is an equidigital number, since it uses as much as digits as its factorization.

138843272563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 52.

The spelling of 138843272563 in words is "one hundred thirty-eight billion, eight hundred forty-three million, two hundred seventy-two thousand, five hundred sixty-three".