135556253009 has 4 divisors (see below), whose sum is σ = 135634475316. Its totient is φ = 135478030704.

The previous prime is 135556252973. The next prime is 135556253051. The reversal of 135556253009 is 900352655531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80497038400 + 55059214609 = 283720^2 + 234647^2 .

It is a cyclic number.

It is not a de Polignac number, because 135556253009 - 2⁸ = 135556252753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135556253309) 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 in 3 ways as a sum of consecutive naturals, for example, 39108554 + ... + 39112019.

It is an arithmetic number, because the mean of its divisors is an integer number (33908618829).

Almost surely, 2^135556253009 is an apocalyptic number.

It is an amenable number.

135556253009 is a deficient number, since it is larger than the sum of its proper divisors (78222307).

135556253009 is an equidigital number, since it uses as much as digits as its factorization.

135556253009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78222306.

The product of its (nonzero) digits is 607500, while the sum is 44.

The spelling of 135556253009 in words is "one hundred thirty-five billion, five hundred fifty-six million, two hundred fifty-three thousand, nine".