12543576401 has 4 divisors (see below), whose sum is σ = 13088949312. Its totient is φ = 11998203492.

The previous prime is 12543576371. The next prime is 12543576403. The reversal of 12543576401 is 10467534521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12543576401 - 2¹⁰ = 12543575377 is a prime.

It is a super-2 number, since 2×12543576401² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12543576403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272686421 + ... + 272686466.

It is an arithmetic number, because the mean of its divisors is an integer number (3272237328).

Almost surely, 2^12543576401 is an apocalyptic number.

It is an amenable number.

12543576401 is a deficient number, since it is larger than the sum of its proper divisors (545372911).

12543576401 is an equidigital number, since it uses as much as digits as its factorization.

12543576401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545372910.

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 12543576401 in words is "twelve billion, five hundred forty-three million, five hundred seventy-six thousand, four hundred one".