12516565144 has 16 divisors (see below), whose sum is σ = 23472344520. Its totient is φ = 6257273280.

The previous prime is 12516565121. The next prime is 12516565147. The reversal of 12516565144 is 44156561521.

It is a junction number, because it is equal to n+sod(n) for n = 12516565097 and 12516565106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12516565147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72094 + ... + 173869.

Almost surely, 2^12516565144 is an apocalyptic number.

It is an amenable number.

12516565144 is a deficient number, since it is larger than the sum of its proper divisors (10955779376).

12516565144 is a wasteful number, since it uses less digits than its factorization.

12516565144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252330 (or 252326 counting only the distinct ones).

The product of its digits is 144000, while the sum is 40.

The spelling of 12516565144 in words is "twelve billion, five hundred sixteen million, five hundred sixty-five thousand, one hundred forty-four".