138280949453 has 2 divisors, whose sum is σ = 138280949454. Its totient is φ = 138280949452.

The previous prime is 138280949447. The next prime is 138280949533. The reversal of 138280949453 is 354949082831.

138280949453 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 can be written as a sum of positive squares in only one way, i.e., 69336369124 + 68944580329 = 263318^2 + 262573^2 .

It is a cyclic number.

It is not a de Polignac number, because 138280949453 - 2¹² = 138280945357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138280949423) 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, 69140474726 + 69140474727.

It is an arithmetic number, because the mean of its divisors is an integer number (69140474727).

Almost surely, 2^138280949453 is an apocalyptic number.

It is an amenable number.

138280949453 is a deficient number, since it is larger than the sum of its proper divisors (1).

138280949453 is an equidigital number, since it uses as much as digits as its factorization.

138280949453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7464960, while the sum is 56.

The spelling of 138280949453 in words is "one hundred thirty-eight billion, two hundred eighty million, nine hundred forty-nine thousand, four hundred fifty-three".