15120322345 has 4 divisors (see below), whose sum is σ = 18144386820. Its totient is φ = 12096257872.

The previous prime is 15120322289. The next prime is 15120322361. The reversal of 15120322345 is 54322302151.

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 11545717401 + 3574604944 = 107451^2 + 59788^2 .

It is a cyclic number.

It is not a de Polignac number, because 15120322345 - 2¹¹ = 15120320297 is a prime.

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, 1512032230 + ... + 1512032239.

It is an arithmetic number, because the mean of its divisors is an integer number (4536096705).

Almost surely, 2^15120322345 is an apocalyptic number.

It is an amenable number.

15120322345 is a deficient number, since it is larger than the sum of its proper divisors (3024064475).

15120322345 is an equidigital number, since it uses as much as digits as its factorization.

15120322345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3024064474.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 15120322345 its reverse (54322302151), we get a palindrome (69442624496).

The spelling of 15120322345 in words is "fifteen billion, one hundred twenty million, three hundred twenty-two thousand, three hundred forty-five".