135404025205 has 8 divisors (see below), whose sum is σ = 162531051192. Its totient is φ = 108292406208.

The previous prime is 135404025109. The next prime is 135404025221. The reversal of 135404025205 is 502520404531.

It can be written as a sum of positive squares in 4 ways, for example, as 16323128644 + 119080896561 = 127762^2 + 345081^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135404025205 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3832402 + ... + 3867571.

It is an arithmetic number, because the mean of its divisors is an integer number (20316381399).

Almost surely, 2^135404025205 is an apocalyptic number.

It is an amenable number.

135404025205 is a deficient number, since it is larger than the sum of its proper divisors (27127025987).

135404025205 is an equidigital number, since it uses as much as digits as its factorization.

135404025205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7703495.

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 135404025205 its reverse (502520404531), we get a palindrome (637924429736).

The spelling of 135404025205 in words is "one hundred thirty-five billion, four hundred four million, twenty-five thousand, two hundred five".