12543610556416 has 39 divisors (see below), whose sum is σ = 25084611997851. Its totient is φ = 6271691943936.

The previous prime is 12543610556371. The next prime is 12543610556417. The reversal of 12543610556416 is 61465501634521.

The square root of 12543610556416 is 3541696.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12543610556416.

It is not an unprimeable number, because it can be changed into a prime (12543610556417) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 226640875 + ... + 226696213.

Almost surely, 2^{12543610556416} is an apocalyptic number.

12543610556416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

12543610556416 is the 3541696-th square number.

It is an amenable number.

12543610556416 is a deficient number, since it is larger than the sum of its proper divisors (12541001441435).

12543610556416 is an frugal number, since it uses more digits than its factorization.

12543610556416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110702 (or 55341 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 49.

Multiplying 12543610556416 by its sum of digits (49), we get a square (614636917264384 = 24791872²).

The spelling of 12543610556416 in words is "twelve trillion, five hundred forty-three billion, six hundred ten million, five hundred fifty-six thousand, four hundred sixteen".