135144442405 has 12 divisors (see below), whose sum is σ = 188650609740. Its totient is φ = 92670474624.

The previous prime is 135144442373. The next prime is 135144442417. The reversal of 135144442405 is 504244441531.

It can be written as a sum of positive squares in 2 ways, for example, as 37561928481 + 97582513924 = 193809^2 + 312382^2 .

It is not a de Polignac number, because 135144442405 - 2⁵ = 135144442373 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 275804740 + ... + 275805229.

It is an arithmetic number, because the mean of its divisors is an integer number (15720884145).

Almost surely, 2^135144442405 is an apocalyptic number.

It is an amenable number.

135144442405 is a deficient number, since it is larger than the sum of its proper divisors (53506167335).

135144442405 is an equidigital number, since it uses as much as digits as its factorization.

135144442405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551609988 (or 551609981 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 37.

Adding to 135144442405 its reverse (504244441531), we get a palindrome (639388883936).

The spelling of 135144442405 in words is "one hundred thirty-five billion, one hundred forty-four million, four hundred forty-two thousand, four hundred five".