12513765415 has 4 divisors (see below), whose sum is σ = 15016518504. Its totient is φ = 10011012328.

The previous prime is 12513765403. The next prime is 12513765487. The reversal of 12513765415 is 51456731521.

It is a happy number.

12513765415 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.

It is a cyclic number.

It is not a de Polignac number, because 12513765415 - 2⁹ = 12513764903 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

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, 1251376537 + ... + 1251376546.

It is an arithmetic number, because the mean of its divisors is an integer number (3754129626).

Almost surely, 2^12513765415 is an apocalyptic number.

12513765415 is a deficient number, since it is larger than the sum of its proper divisors (2502753089).

12513765415 is an equidigital number, since it uses as much as digits as its factorization.

12513765415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2502753088.

The product of its digits is 126000, while the sum is 40.

The spelling of 12513765415 in words is "twelve billion, five hundred thirteen million, seven hundred sixty-five thousand, four hundred fifteen".