138485568293 has 2 divisors, whose sum is σ = 138485568294. Its totient is φ = 138485568292.

The previous prime is 138485568281. The next prime is 138485568323. The reversal of 138485568293 is 392865584831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99072598564 + 39412969729 = 314758^2 + 198527^2 .

It is a cyclic number.

It is not a de Polignac number, because 138485568293 - 2⁸ = 138485568037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138485568253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69242784146 + 69242784147.

It is an arithmetic number, because the mean of its divisors is an integer number (69242784147).

Almost surely, 2^138485568293 is an apocalyptic number.

It is an amenable number.

138485568293 is a deficient number, since it is larger than the sum of its proper divisors (1).

138485568293 is an equidigital number, since it uses as much as digits as its factorization.

138485568293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49766400, while the sum is 62.

The spelling of 138485568293 in words is "one hundred thirty-eight billion, four hundred eighty-five million, five hundred sixty-eight thousand, two hundred ninety-three".