12446564465 has 4 divisors (see below), whose sum is σ = 14935877364. Its totient is φ = 9957251568.

The previous prime is 12446564461. The next prime is 12446564509. The reversal of 12446564465 is 56446564421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9949663504 + 2496900961 = 99748^2 + 49969^2 .

It is a cyclic number.

It is not a de Polignac number, because 12446564465 - 2² = 12446564461 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12446564461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1244656442 + ... + 1244656451.

It is an arithmetic number, because the mean of its divisors is an integer number (3733969341).

Almost surely, 2^12446564465 is an apocalyptic number.

It is an amenable number.

12446564465 is a deficient number, since it is larger than the sum of its proper divisors (2489312899).

12446564465 is an equidigital number, since it uses as much as digits as its factorization.

12446564465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2489312898.

The product of its digits is 2764800, while the sum is 47.

The spelling of 12446564465 in words is "twelve billion, four hundred forty-six million, five hundred sixty-four thousand, four hundred sixty-five".