12543632431 has 8 divisors (see below), whose sum is σ = 13686542928. Its totient is φ = 11401152000.

The previous prime is 12543632419. The next prime is 12543632447. The reversal of 12543632431 is 13423634521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12543632431 - 2⁵ = 12543632399 is a prime.

It is a super-2 number, since 2×12543632431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12543632531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44940 + ... + 164641.

It is an arithmetic number, because the mean of its divisors is an integer number (1710817866).

Almost surely, 2^12543632431 is an apocalyptic number.

12543632431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12543632431 is a deficient number, since it is larger than the sum of its proper divisors (1142910497).

12543632431 is a wasteful number, since it uses less digits than its factorization.

12543632431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215033.

The product of its digits is 51840, while the sum is 34.

The spelling of 12543632431 in words is "twelve billion, five hundred forty-three million, six hundred thirty-two thousand, four hundred thirty-one".