12512513765 has 4 divisors (see below), whose sum is σ = 15015016524. Its totient is φ = 10010011008.

The previous prime is 12512513753. The next prime is 12512513773. The reversal of 12512513765 is 56731521521.

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 4098304324 + 8414209441 = 64018^2 + 91729^2 .

It is a cyclic number.

It is not a de Polignac number, because 12512513765 - 2¹⁰ = 12512512741 is a prime.

It is a Duffinian number.

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, 1251251372 + ... + 1251251381.

It is an arithmetic number, because the mean of its divisors is an integer number (3753754131).

Almost surely, 2^12512513765 is an apocalyptic number.

It is an amenable number.

12512513765 is a deficient number, since it is larger than the sum of its proper divisors (2502502759).

12512513765 is an equidigital number, since it uses as much as digits as its factorization.

12512513765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2502502758.

The product of its digits is 63000, while the sum is 38.

The spelling of 12512513765 in words is "twelve billion, five hundred twelve million, five hundred thirteen thousand, seven hundred sixty-five".