135135644641 has 2 divisors, whose sum is σ = 135135644642. Its totient is φ = 135135644640.

The previous prime is 135135644617. The next prime is 135135644647. The reversal of 135135644641 is 146446531531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88087865616 + 47047779025 = 296796^2 + 216905^2 .

It is a cyclic number.

It is not a de Polignac number, because 135135644641 - 2²⁷ = 135001426913 is a prime.

It is not a weakly prime, because it can be changed into another prime (135135644647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67567822320 + 67567822321.

It is an arithmetic number, because the mean of its divisors is an integer number (67567822321).

Almost surely, 2^135135644641 is an apocalyptic number.

It is an amenable number.

135135644641 is a deficient number, since it is larger than the sum of its proper divisors (1).

135135644641 is an equidigital number, since it uses as much as digits as its factorization.

135135644641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 43.

The spelling of 135135644641 in words is "one hundred thirty-five billion, one hundred thirty-five million, six hundred forty-four thousand, six hundred forty-one".