15442240145 has 4 divisors (see below), whose sum is σ = 18530688180. Its totient is φ = 12353792112.

The previous prime is 15442240103. The next prime is 15442240159. The reversal of 15442240145 is 54104224451.

15442240145 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: 54104224451 = 74353 ⋅727667.

It can be written as a sum of positive squares in 2 ways, for example, as 8988367249 + 6453872896 = 94807^2 + 80336^2 .

It is a cyclic number.

It is not a de Polignac number, because 15442240145 - 2¹⁶ = 15442174609 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, 1544224010 + ... + 1544224019.

It is an arithmetic number, because the mean of its divisors is an integer number (4632672045).

Almost surely, 2^15442240145 is an apocalyptic number.

It is an amenable number.

15442240145 is a deficient number, since it is larger than the sum of its proper divisors (3088448035).

15442240145 is an equidigital number, since it uses as much as digits as its factorization.

15442240145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3088448034.

The product of its (nonzero) digits is 25600, while the sum is 32.

Adding to 15442240145 its reverse (54104224451), we get a palindrome (69546464596).

The spelling of 15442240145 in words is "fifteen billion, four hundred forty-two million, two hundred forty thousand, one hundred forty-five".