12513123065 has 8 divisors (see below), whose sum is σ = 15261907848. Its totient is φ = 9846391680.

The previous prime is 12513123053. The next prime is 12513123083. The reversal of 12513123065 is 56032131521.

It can be written as a sum of positive squares in 4 ways, for example, as 1775189689 + 10737933376 = 42133^2 + 103624^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-12513123065 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20513012 + ... + 20513621.

It is an arithmetic number, because the mean of its divisors is an integer number (1907738481).

Almost surely, 2^12513123065 is an apocalyptic number.

It is an amenable number.

12513123065 is a deficient number, since it is larger than the sum of its proper divisors (2748784783).

12513123065 is an equidigital number, since it uses as much as digits as its factorization.

12513123065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41026699.

The product of its (nonzero) digits is 5400, while the sum is 29.

Adding to 12513123065 its reverse (56032131521), we get a palindrome (68545254586).

The spelling of 12513123065 in words is "twelve billion, five hundred thirteen million, one hundred twenty-three thousand, sixty-five".