12663511225 has 12 divisors (see below), whose sum is σ = 16626445884. Its totient is φ = 9534878720.

The previous prime is 12663511193. The next prime is 12663511243. The reversal of 12663511225 is 52211536621.

It can be written as a sum of positive squares in 6 ways, for example, as 1635150969 + 11028360256 = 40437^2 + 105016^2 .

It is not a de Polignac number, because 12663511225 - 2⁵ = 12663511193 is a prime.

It is a super-3 number, since 3×12663511225³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14897824 + ... + 14898673.

It is an arithmetic number, because the mean of its divisors is an integer number (1385537157).

Almost surely, 2^12663511225 is an apocalyptic number.

It is an amenable number.

12663511225 is a deficient number, since it is larger than the sum of its proper divisors (3962934659).

12663511225 is a wasteful number, since it uses less digits than its factorization.

12663511225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29796524 (or 29796519 counting only the distinct ones).

The product of its digits is 21600, while the sum is 34.

The spelling of 12663511225 in words is "twelve billion, six hundred sixty-three million, five hundred eleven thousand, two hundred twenty-five".