155135442305 has 4 divisors (see below), whose sum is σ = 186162530772. Its totient is φ = 124108353840.

The previous prime is 155135442299. The next prime is 155135442307. The reversal of 155135442305 is 503244531551.

155135442305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 53364234049 + 101771208256 = 231007^2 + 319016^2 .

It is not a de Polignac number, because 155135442305 - 2⁴ = 155135442289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155135442307) 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, 15513544226 + ... + 15513544235.

It is an arithmetic number, because the mean of its divisors is an integer number (46540632693).

Almost surely, 2^155135442305 is an apocalyptic number.

It is an amenable number.

155135442305 is a deficient number, since it is larger than the sum of its proper divisors (31027088467).

155135442305 is an equidigital number, since it uses as much as digits as its factorization.

155135442305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31027088466.

The product of its (nonzero) digits is 180000, while the sum is 38.

Adding to 155135442305 its reverse (503244531551), we get a palindrome (658379973856).

The spelling of 155135442305 in words is "one hundred fifty-five billion, one hundred thirty-five million, four hundred forty-two thousand, three hundred five".