135302540435521 has 2 divisors, whose sum is σ = 135302540435522. Its totient is φ = 135302540435520.

The previous prime is 135302540435519. The next prime is 135302540435561. The reversal of 135302540435521 is 125534045203531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77144163080625 + 58158377354896 = 8783175^2 + 7626164^2 .

It is a cyclic number.

It is not a de Polignac number, because 135302540435521 - 2¹ = 135302540435519 is a prime.

Together with 135302540435519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (135302540435561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67651270217760 + 67651270217761.

It is an arithmetic number, because the mean of its divisors is an integer number (67651270217761).

Almost surely, 2^{135302540435521} is an apocalyptic number.

It is an amenable number.

135302540435521 is a deficient number, since it is larger than the sum of its proper divisors (1).

135302540435521 is an equidigital number, since it uses as much as digits as its factorization.

135302540435521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080000, while the sum is 43.

The spelling of 135302540435521 in words is "one hundred thirty-five trillion, three hundred two billion, five hundred forty million, four hundred thirty-five thousand, five hundred twenty-one".