12543975552 has 128 divisors (see below), whose sum is σ = 34430728320. Its totient is φ = 4044185600.

The previous prime is 12543975533. The next prime is 12543975557. The reversal of 12543975552 is 25557934521.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (12543975557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1440652 + ... + 1449332.

It is an arithmetic number, because the mean of its divisors is an integer number (268990065).

Almost surely, 2^12543975552 is an apocalyptic number.

12543975552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12543975552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17215364160).

12543975552 is an abundant number, since it is smaller than the sum of its proper divisors (21886752768).

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

12543975552 is an equidigital number, since it uses as much as digits as its factorization.

12543975552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8822 (or 8810 counting only the distinct ones).

The product of its digits is 1890000, while the sum is 48.

The spelling of 12543975552 in words is "twelve billion, five hundred forty-three million, nine hundred seventy-five thousand, five hundred fifty-two".