15120440245 has 4 divisors (see below), whose sum is σ = 18144528300. Its totient is φ = 12096352192.

The previous prime is 15120440233. The next prime is 15120440261. The reversal of 15120440245 is 54204402151.

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 3249684036 + 11870756209 = 57006^2 + 108953^2 .

It is a cyclic number.

It is not a de Polignac number, because 15120440245 - 2¹⁷ = 15120309173 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1512044020 + ... + 1512044029.

It is an arithmetic number, because the mean of its divisors is an integer number (4536132075).

Almost surely, 2^15120440245 is an apocalyptic number.

It is an amenable number.

15120440245 is a deficient number, since it is larger than the sum of its proper divisors (3024088055).

15120440245 is an equidigital number, since it uses as much as digits as its factorization.

15120440245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3024088054.

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 15120440245 its reverse (54204402151), we get a palindrome (69324842396).

The spelling of 15120440245 in words is "fifteen billion, one hundred twenty million, four hundred forty thousand, two hundred forty-five".