12451512520 has 16 divisors (see below), whose sum is σ = 28015903260. Its totient is φ = 4980604992.

The previous prime is 12451512503. The next prime is 12451512527. The reversal of 12451512520 is 2521515421.

It can be written as a sum of positive squares in 2 ways, for example, as 11538626724 + 912885796 = 107418^2 + 30214^2 .

It is not an unprimeable number, because it can be changed into a prime (12451512527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155643867 + ... + 155643946.

Almost surely, 2^12451512520 is an apocalyptic number.

12451512520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12451512520 is an abundant number, since it is smaller than the sum of its proper divisors (15564390740).

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

12451512520 is a wasteful number, since it uses less digits than its factorization.

12451512520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311287824 (or 311287820 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 28.

The spelling of 12451512520 in words is "twelve billion, four hundred fifty-one million, five hundred twelve thousand, five hundred twenty".