155423240305 has 4 divisors (see below), whose sum is σ = 186507888372. Its totient is φ = 124338592240.

The previous prime is 155423240293. The next prime is 155423240339. The reversal of 155423240305 is 503042324551.

155423240305 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, and also an emirpimes, since its reverse is a distinct semiprime: 503042324551 = 13 ⋅38695563427.

It can be written as a sum of positive squares in 2 ways, for example, as 56370155776 + 99053084529 = 237424^2 + 314727^2 .

It is not a de Polignac number, because 155423240305 - 2⁷ = 155423240177 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 15542324026 + ... + 15542324035.

It is an arithmetic number, because the mean of its divisors is an integer number (46626972093).

Almost surely, 2^155423240305 is an apocalyptic number.

It is an amenable number.

155423240305 is a deficient number, since it is larger than the sum of its proper divisors (31084648067).

155423240305 is an equidigital number, since it uses as much as digits as its factorization.

155423240305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31084648066.

The product of its (nonzero) digits is 72000, while the sum is 34.

Adding to 155423240305 its reverse (503042324551), we get a palindrome (658465564856).

The spelling of 155423240305 in words is "one hundred fifty-five billion, four hundred twenty-three million, two hundred forty thousand, three hundred five".