138675494281 has 2 divisors, whose sum is σ = 138675494282. Its totient is φ = 138675494280.

The previous prime is 138675494273. The next prime is 138675494317. The reversal of 138675494281 is 182494576831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131689877881 + 6985616400 = 362891^2 + 83580^2 .

It is a cyclic number.

It is not a de Polignac number, because 138675494281 - 2³ = 138675494273 is a prime.

It is a super-2 number, since 2×138675494281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (138675494201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69337747140 + 69337747141.

It is an arithmetic number, because the mean of its divisors is an integer number (69337747141).

Almost surely, 2^138675494281 is an apocalyptic number.

It is an amenable number.

138675494281 is a deficient number, since it is larger than the sum of its proper divisors (1).

138675494281 is an equidigital number, since it uses as much as digits as its factorization.

138675494281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11612160, while the sum is 58.

The spelling of 138675494281 in words is "one hundred thirty-eight billion, six hundred seventy-five million, four hundred ninety-four thousand, two hundred eighty-one".