12516320529 has 16 divisors (see below), whose sum is σ = 18597733440. Its totient is φ = 8319447360.

The previous prime is 12516320507. The next prime is 12516320539. The reversal of 12516320529 is 92502361521.

It is a happy number.

12516320529 is a `hidden beast` number, since 1 + 2 + 51 + 63 + 20 + 529 = 666.

It is not a de Polignac number, because 12516320529 - 2⁵ = 12516320497 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12516320493 and 12516320502.

It is not an unprimeable number, because it can be changed into a prime (12516320539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 678687 + ... + 696884.

It is an arithmetic number, because the mean of its divisors is an integer number (1162358340).

Almost surely, 2^12516320529 is an apocalyptic number.

It is an amenable number.

12516320529 is a deficient number, since it is larger than the sum of its proper divisors (6081412911).

12516320529 is a wasteful number, since it uses less digits than its factorization.

12516320529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375917 (or 1375911 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 12516320529 in words is "twelve billion, five hundred sixteen million, three hundred twenty thousand, five hundred twenty-nine".