135493686551809 has 8 divisors (see below), whose sum is σ = 135663154788392. Its totient is φ = 135324243198720.

The previous prime is 135493686551789. The next prime is 135493686551933. The reversal of 135493686551809 is 908155686394531.

It can be written as a sum of positive squares in 4 ways, for example, as 4826382791409 + 130667303760400 = 2196903^2 + 11430980^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135493686551809 - 2²¹ = 135493684454657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135493686531809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4688137 + ... + 17116249.

It is an arithmetic number, because the mean of its divisors is an integer number (16957894348549).

Almost surely, 2^{135493686551809} is an apocalyptic number.

It is an amenable number.

135493686551809 is a deficient number, since it is larger than the sum of its proper divisors (169468236583).

135493686551809 is a wasteful number, since it uses less digits than its factorization.

135493686551809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12441747.

The product of its (nonzero) digits is 839808000, while the sum is 73.

The spelling of 135493686551809 in words is "one hundred thirty-five trillion, four hundred ninety-three billion, six hundred eighty-six million, five hundred fifty-one thousand, eight hundred nine".