135591535789 has 4 divisors (see below), whose sum is σ = 138898646460. Its totient is φ = 132284425120.

The previous prime is 135591535777. The next prime is 135591535817. The reversal of 135591535789 is 987535195531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 987535195531 = 467 ⋅2114636393.

It can be written as a sum of positive squares in 2 ways, for example, as 15818092900 + 119773442889 = 125770^2 + 346083^2 .

It is a cyclic number.

It is not a de Polignac number, because 135591535789 - 2¹⁷ = 135591404717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135591535759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1653555274 + ... + 1653555355.

It is an arithmetic number, because the mean of its divisors is an integer number (34724661615).

Almost surely, 2^135591535789 is an apocalyptic number.

It is an amenable number.

135591535789 is a deficient number, since it is larger than the sum of its proper divisors (3307110671).

135591535789 is an equidigital number, since it uses as much as digits as its factorization.

135591535789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3307110670.

The product of its digits is 25515000, while the sum is 61.

The spelling of 135591535789 in words is "one hundred thirty-five billion, five hundred ninety-one million, five hundred thirty-five thousand, seven hundred eighty-nine".