12516203600 has 30 divisors (see below), whose sum is σ = 30070180110. Its totient is φ = 5006481280.

The previous prime is 12516203587. The next prime is 12516203611. The reversal of 12516203600 is 630261521.

It can be written as a sum of positive squares in 3 ways, for example, as 1688552464 + 10827651136 = 41092^2 + 104056^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12516203600.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 15644855 + ... + 15645654.

It is an arithmetic number, because the mean of its divisors is an integer number (1002339337).

Almost surely, 2^12516203600 is an apocalyptic number.

12516203600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12516203600 is an abundant number, since it is smaller than the sum of its proper divisors (17553976510).

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

12516203600 is a wasteful number, since it uses less digits than its factorization.

12516203600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31290527 (or 31290516 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The spelling of 12516203600 in words is "twelve billion, five hundred sixteen million, two hundred three thousand, six hundred".