12126173578 has 16 divisors (see below), whose sum is σ = 19150614720. Its totient is φ = 5742769536.

The previous prime is 12126173573. The next prime is 12126173617. The reversal of 12126173578 is 87537162121.

12126173578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12126173573) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 164851 + ... + 226777.

It is an arithmetic number, because the mean of its divisors is an integer number (1196913420).

Almost surely, 2^12126173578 is an apocalyptic number.

12126173578 is a deficient number, since it is larger than the sum of its proper divisors (7024441142).

12126173578 is a wasteful number, since it uses less digits than its factorization.

12126173578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67101.

The product of its digits is 141120, while the sum is 43.

The spelling of 12126173578 in words is "twelve billion, one hundred twenty-six million, one hundred seventy-three thousand, five hundred seventy-eight".