138168796253 has 2 divisors, whose sum is σ = 138168796254. Its totient is φ = 138168796252.

The previous prime is 138168796237. The next prime is 138168796273. The reversal of 138168796253 is 352697861831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70383028804 + 67785767449 = 265298^2 + 260357^2 .

It is a cyclic number.

It is not a de Polignac number, because 138168796253 - 2⁴ = 138168796237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138168796192 and 138168796201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138168796273) 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, 69084398126 + 69084398127.

It is an arithmetic number, because the mean of its divisors is an integer number (69084398127).

Almost surely, 2^138168796253 is an apocalyptic number.

It is an amenable number.

138168796253 is a deficient number, since it is larger than the sum of its proper divisors (1).

138168796253 is an equidigital number, since it uses as much as digits as its factorization.

138168796253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13063680, while the sum is 59.

The spelling of 138168796253 in words is "one hundred thirty-eight billion, one hundred sixty-eight million, seven hundred ninety-six thousand, two hundred fifty-three".