12648765125 has 8 divisors (see below), whose sum is σ = 15785659032. Its totient is φ = 10119012000.

The previous prime is 12648765121. The next prime is 12648765137. The reversal of 12648765125 is 52156784621.

It can be written as a sum of positive squares in 4 ways, for example, as 470759809 + 12178005316 = 21697^2 + 110354^2 .

It is not a de Polignac number, because 12648765125 - 2² = 12648765121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12648765125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12648765121) 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, 50594936 + ... + 50595185.

It is an arithmetic number, because the mean of its divisors is an integer number (1973207379).

Almost surely, 2^12648765125 is an apocalyptic number.

It is an amenable number.

12648765125 is a deficient number, since it is larger than the sum of its proper divisors (3136893907).

12648765125 is an equidigital number, since it uses as much as digits as its factorization.

12648765125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101190136 (or 101190126 counting only the distinct ones).

The product of its digits is 806400, while the sum is 47.

The spelling of 12648765125 in words is "twelve billion, six hundred forty-eight million, seven hundred sixty-five thousand, one hundred twenty-five".