12565043432 has 32 divisors (see below), whose sum is σ = 23624939520. Its totient is φ = 6265089600.

The previous prime is 12565043431. The next prime is 12565043479. The reversal of 12565043432 is 23434056521.

It is a junction number, because it is equal to n+sod(n) for n = 12565043392 and 12565043401.

It is not an unprimeable number, because it can be changed into a prime (12565043431) 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, 6693278 + ... + 6695154.

It is an arithmetic number, because the mean of its divisors is an integer number (738279360).

Almost surely, 2^12565043432 is an apocalyptic number.

It is an amenable number.

12565043432 is a deficient number, since it is larger than the sum of its proper divisors (11059896088).

12565043432 is a wasteful number, since it uses less digits than its factorization.

12565043432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3761 (or 3757 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 12565043432 its reverse (23434056521), we get a palindrome (35999099953).

The spelling of 12565043432 in words is "twelve billion, five hundred sixty-five million, forty-three thousand, four hundred thirty-two".