12505750805 has 8 divisors (see below), whose sum is σ = 15412493112. Its totient is φ = 9734205888.

The previous prime is 12505750801. The next prime is 12505750819. The reversal of 12505750805 is 50805750521.

It can be written as a sum of positive squares in 4 ways, for example, as 4679517649 + 7826233156 = 68407^2 + 88466^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12505750805 - 2² = 12505750801 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12505750801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33799142 + ... + 33799511.

It is an arithmetic number, because the mean of its divisors is an integer number (1926561639).

Almost surely, 2^12505750805 is an apocalyptic number.

It is an amenable number.

12505750805 is a deficient number, since it is larger than the sum of its proper divisors (2906742307).

12505750805 is an equidigital number, since it uses as much as digits as its factorization.

12505750805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67598695.

The product of its (nonzero) digits is 70000, while the sum is 38.

The spelling of 12505750805 in words is "twelve billion, five hundred five million, seven hundred fifty thousand, eight hundred five".