15530504545 has 4 divisors (see below), whose sum is σ = 18636605460. Its totient is φ = 12424403632.

The previous prime is 15530504533. The next prime is 15530504551. The reversal of 15530504545 is 54540503551.

It is a happy number.

15530504545 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: 54540503551 = 29 ⋅1880707019.

It can be written as a sum of positive squares in 2 ways, for example, as 6549341184 + 8981163361 = 80928^2 + 94769^2 .

It is a cyclic number.

It is not a de Polignac number, because 15530504545 - 2¹⁵ = 15530471777 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1553050450 + ... + 1553050459.

It is an arithmetic number, because the mean of its divisors is an integer number (4659151365).

Almost surely, 2^15530504545 is an apocalyptic number.

It is an amenable number.

15530504545 is a deficient number, since it is larger than the sum of its proper divisors (3106100915).

15530504545 is an equidigital number, since it uses as much as digits as its factorization.

15530504545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3106100914.

The product of its (nonzero) digits is 150000, while the sum is 37.

The spelling of 15530504545 in words is "fifteen billion, five hundred thirty million, five hundred four thousand, five hundred forty-five".