12328987636225 has 24 divisors (see below), whose sum is σ = 16465538233592. Its totient is φ = 9103599590400.

The previous prime is 12328987636211. The next prime is 12328987636253. The reversal of 12328987636225 is 52263678982321.

It can be written as a sum of positive squares in 12 ways, for example, as 593320494529 + 11735667141696 = 770273^2 + 3425736^2 .

It is not a de Polignac number, because 12328987636225 - 2²⁵ = 12328954081793 is a prime.

It is a super-2 number, since 2×12328987636225² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1522585 + ... + 5193865.

Almost surely, 2^{12328987636225} is an apocalyptic number.

It is an amenable number.

12328987636225 is a deficient number, since it is larger than the sum of its proper divisors (4136550597367).

12328987636225 is a wasteful number, since it uses less digits than its factorization.

12328987636225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3681637 (or 3681632 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 64.

The spelling of 12328987636225 in words is "twelve trillion, three hundred twenty-eight billion, nine hundred eighty-seven million, six hundred thirty-six thousand, two hundred twenty-five".