134635656521 has 2 divisors, whose sum is σ = 134635656522. Its totient is φ = 134635656520.

The previous prime is 134635656511. The next prime is 134635656527. The reversal of 134635656521 is 125656536431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114420504121 + 20215152400 = 338261^2 + 142180^2 .

It is a cyclic number.

It is not a de Polignac number, because 134635656521 - 2⁶ = 134635656457 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (134635656527) 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, 67317828260 + 67317828261.

It is an arithmetic number, because the mean of its divisors is an integer number (67317828261).

Almost surely, 2^134635656521 is an apocalyptic number.

It is an amenable number.

134635656521 is a deficient number, since it is larger than the sum of its proper divisors (1).

134635656521 is an equidigital number, since it uses as much as digits as its factorization.

134635656521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944000, while the sum is 47.

The spelling of 134635656521 in words is "one hundred thirty-four billion, six hundred thirty-five million, six hundred fifty-six thousand, five hundred twenty-one".