12565043459 has 32 divisors (see below), whose sum is σ = 13352621568. Its totient is φ = 11811744000.

The previous prime is 12565043431. The next prime is 12565043479. The reversal of 12565043459 is 95434056521.

It is a cyclic number.

It is not a de Polignac number, because 12565043459 - 2²⁴ = 12548266243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12565043479) 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 31 ways as a sum of consecutive naturals, for example, 40401914 + ... + 40402224.

It is an arithmetic number, because the mean of its divisors is an integer number (417269424).

Almost surely, 2^12565043459 is an apocalyptic number.

12565043459 is a deficient number, since it is larger than the sum of its proper divisors (787578109).

12565043459 is a wasteful number, since it uses less digits than its factorization.

12565043459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699.

The product of its (nonzero) digits is 648000, while the sum is 44.

The spelling of 12565043459 in words is "twelve billion, five hundred sixty-five million, forty-three thousand, four hundred fifty-nine".