138000533557 has 2 divisors, whose sum is σ = 138000533558. Its totient is φ = 138000533556.

The previous prime is 138000533543. The next prime is 138000533621. The reversal of 138000533557 is 755335000831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115617680676 + 22382852881 = 340026^2 + 149609^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138000533557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138000533537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69000266778 + 69000266779.

It is an arithmetic number, because the mean of its divisors is an integer number (69000266779).

Almost surely, 2^138000533557 is an apocalyptic number.

It is an amenable number.

138000533557 is a deficient number, since it is larger than the sum of its proper divisors (1).

138000533557 is an equidigital number, since it uses as much as digits as its factorization.

138000533557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189000, while the sum is 40.

The spelling of 138000533557 in words is "one hundred thirty-eight billion, five hundred thirty-three thousand, five hundred fifty-seven".