138586427461 has 2 divisors, whose sum is σ = 138586427462. Its totient is φ = 138586427460.

The previous prime is 138586427459. The next prime is 138586427491. The reversal of 138586427461 is 164724685831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136544291361 + 2042136100 = 369519^2 + 45190^2 .

It is a cyclic number.

It is not a de Polignac number, because 138586427461 - 2¹ = 138586427459 is a prime.

Together with 138586427459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138586427491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69293213730 + 69293213731.

It is an arithmetic number, because the mean of its divisors is an integer number (69293213731).

Almost surely, 2^138586427461 is an apocalyptic number.

It is an amenable number.

138586427461 is a deficient number, since it is larger than the sum of its proper divisors (1).

138586427461 is an equidigital number, since it uses as much as digits as its factorization.

138586427461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7741440, while the sum is 55.

The spelling of 138586427461 in words is "one hundred thirty-eight billion, five hundred eighty-six million, four hundred twenty-seven thousand, four hundred sixty-one".