12516071720 has 32 divisors (see below), whose sum is σ = 29132238600. Its totient is φ = 4833792768.

The previous prime is 12516071717. The next prime is 12516071779. The reversal of 12516071720 is 2717061521.

It can be written as a sum of positive squares in 4 ways, for example, as 10104672484 + 2411399236 = 100522^2 + 49106^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5393699 + ... + 5396018.

Almost surely, 2^12516071720 is an apocalyptic number.

12516071720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12516071720 is an abundant number, since it is smaller than the sum of its proper divisors (16616166880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12516071720 is a wasteful number, since it uses less digits than its factorization.

12516071720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10789757 (or 10789753 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 32.

The spelling of 12516071720 in words is "twelve billion, five hundred sixteen million, seventy-one thousand, seven hundred twenty".