135545512409 has 2 divisors, whose sum is σ = 135545512410. Its totient is φ = 135545512408.

The previous prime is 135545512397. The next prime is 135545512457. The reversal of 135545512409 is 904215545531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73829041225 + 61716471184 = 271715^2 + 248428^2 .

It is a cyclic number.

It is not a de Polignac number, because 135545512409 - 2⁸ = 135545512153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135545512409.

It is not a weakly prime, because it can be changed into another prime (135545512709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67772756204 + 67772756205.

It is an arithmetic number, because the mean of its divisors is an integer number (67772756205).

Almost surely, 2^135545512409 is an apocalyptic number.

It is an amenable number.

135545512409 is a deficient number, since it is larger than the sum of its proper divisors (1).

135545512409 is an equidigital number, since it uses as much as digits as its factorization.

135545512409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540000, while the sum is 44.

The spelling of 135545512409 in words is "one hundred thirty-five billion, five hundred forty-five million, five hundred twelve thousand, four hundred nine".