12520385516 has 12 divisors (see below), whose sum is σ = 22282042440. Its totient is φ = 6154087680.

The previous prime is 12520385497. The next prime is 12520385531. The reversal of 12520385516 is 61558302521.

It is a self number, because there is not a number n which added to its sum of digits gives 12520385516.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26526005 + ... + 26526476.

It is an arithmetic number, because the mean of its divisors is an integer number (1856836870).

Almost surely, 2^12520385516 is an apocalyptic number.

It is an amenable number.

12520385516 is a deficient number, since it is larger than the sum of its proper divisors (9761656924).

12520385516 is a wasteful number, since it uses less digits than its factorization.

12520385516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53052544 (or 53052542 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 38.

The spelling of 12520385516 in words is "twelve billion, five hundred twenty million, three hundred eighty-five thousand, five hundred sixteen".