12004561642 has 4 divisors (see below), whose sum is σ = 18006842466. Its totient is φ = 6002280820.

The previous prime is 12004561631. The next prime is 12004561651. The reversal of 12004561642 is 24616540021.

It is a happy number.

12004561642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24616540021 = 73 ⋅337212877.

It can be written as a sum of positive squares in only one way, i.e., 7885617601 + 4118944041 = 88801^2 + 64179^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3001140409 + ... + 3001140412.

Almost surely, 2^12004561642 is an apocalyptic number.

12004561642 is a deficient number, since it is larger than the sum of its proper divisors (6002280824).

12004561642 is an equidigital number, since it uses as much as digits as its factorization.

12004561642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6002280823.

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 12004561642 in words is "twelve billion, four million, five hundred sixty-one thousand, six hundred forty-two".