12156556445 has 32 divisors (see below), whose sum is σ = 16445683584. Its totient is φ = 8549856000.

The previous prime is 12156556441. The next prime is 12156556501. The reversal of 12156556445 is 54465565121.

12156556445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12156556445 - 2² = 12156556441 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12156556396 and 12156556405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12156556441) 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 31 ways as a sum of consecutive naturals, for example, 213419 + ... + 264311.

It is an arithmetic number, because the mean of its divisors is an integer number (513927612).

Almost surely, 2^12156556445 is an apocalyptic number.

It is an amenable number.

12156556445 is a deficient number, since it is larger than the sum of its proper divisors (4289127139).

12156556445 is a wasteful number, since it uses less digits than its factorization.

12156556445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51053.

The product of its digits is 720000, while the sum is 44.

The spelling of 12156556445 in words is "twelve billion, one hundred fifty-six million, five hundred fifty-six thousand, four hundred forty-five".