12043885732561 has 4 divisors (see below), whose sum is σ = 12048325059172. Its totient is φ = 12039446405952.

The previous prime is 12043885732531. The next prime is 12043885732709. The reversal of 12043885732561 is 16523758834021.

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 11606013697600 + 437872034961 = 3406760^2 + 661719^2 .

It is a cyclic number.

It is not a de Polignac number, because 12043885732561 - 2⁹ = 12043885732049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12043885732531) 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, 2219659236 + ... + 2219664661.

It is an arithmetic number, because the mean of its divisors is an integer number (3012081264793).

Almost surely, 2^{12043885732561} is an apocalyptic number.

It is an amenable number.

12043885732561 is a deficient number, since it is larger than the sum of its proper divisors (4439326611).

12043885732561 is an equidigital number, since it uses as much as digits as its factorization.

12043885732561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4439326610.

The product of its (nonzero) digits is 9676800, while the sum is 55.

The spelling of 12043885732561 in words is "twelve trillion, forty-three billion, eight hundred eighty-five million, seven hundred thirty-two thousand, five hundred sixty-one".