135435342521 has 2 divisors, whose sum is σ = 135435342522. Its totient is φ = 135435342520.

The previous prime is 135435342487. The next prime is 135435342593. The reversal of 135435342521 is 125243534531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111452484025 + 23982858496 = 333845^2 + 154864^2 .

It is a cyclic number.

It is not a de Polignac number, because 135435342521 - 2³⁰ = 134361600697 is a prime.

It is not a weakly prime, because it can be changed into another prime (135435342121) 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, 67717671260 + 67717671261.

It is an arithmetic number, because the mean of its divisors is an integer number (67717671261).

Almost surely, 2^135435342521 is an apocalyptic number.

It is an amenable number.

135435342521 is a deficient number, since it is larger than the sum of its proper divisors (1).

135435342521 is an equidigital number, since it uses as much as digits as its factorization.

135435342521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216000, while the sum is 38.

The spelling of 135435342521 in words is "one hundred thirty-five billion, four hundred thirty-five million, three hundred forty-two thousand, five hundred twenty-one".