12464640569 has 4 divisors (see below), whose sum is σ = 12465540480. Its totient is φ = 12463740660.

The previous prime is 12464640557. The next prime is 12464640589. The reversal of 12464640569 is 96504646421.

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 12464640569 - 2⁸ = 12464640313 is a prime.

It is a super-2 number, since 2×12464640569² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12464640589) 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, 428849 + ... + 456990.

It is an arithmetic number, because the mean of its divisors is an integer number (3116385120).

Almost surely, 2^12464640569 is an apocalyptic number.

It is an amenable number.

12464640569 is a deficient number, since it is larger than the sum of its proper divisors (899911).

12464640569 is an equidigital number, since it uses as much as digits as its factorization.

12464640569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899910.

The product of its (nonzero) digits is 1244160, while the sum is 47.

The spelling of 12464640569 in words is "twelve billion, four hundred sixty-four million, six hundred forty thousand, five hundred sixty-nine".