12043664571 has 4 divisors (see below), whose sum is σ = 16058219432. Its totient is φ = 8029109712.

The previous prime is 12043664543. The next prime is 12043664573. The reversal of 12043664571 is 17546634021.

It is a happy number.

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

It is not a de Polignac number, because 12043664571 - 2²⁶ = 11976555707 is a prime.

It is a super-2 number, since 2×12043664571² (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 (12043664573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2007277426 + ... + 2007277431.

It is an arithmetic number, because the mean of its divisors is an integer number (4014554858).

Almost surely, 2^12043664571 is an apocalyptic number.

12043664571 is a deficient number, since it is larger than the sum of its proper divisors (4014554861).

12043664571 is an equidigital number, since it uses as much as digits as its factorization.

12043664571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4014554860.

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 12043664571 in words is "twelve billion, forty-three million, six hundred sixty-four thousand, five hundred seventy-one".