12045832978 has 4 divisors (see below), whose sum is σ = 18068749470. Its totient is φ = 6022916488.

The previous prime is 12045832969. The next prime is 12045833027. The reversal of 12045832978 is 87923854021.

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

It can be written as a sum of positive squares in only one way, i.e., 10981572849 + 1064260129 = 104793^2 + 32623^2 .

It is a Smith number, since the sum of its digits (49) 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 (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3011458243 + ... + 3011458246.

Almost surely, 2^12045832978 is an apocalyptic number.

12045832978 is a deficient number, since it is larger than the sum of its proper divisors (6022916492).

12045832978 is an equidigital number, since it uses as much as digits as its factorization.

12045832978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6022916491.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 12045832978 in words is "twelve billion, forty-five million, eight hundred thirty-two thousand, nine hundred seventy-eight".