12156195571 has 32 divisors (see below), whose sum is σ = 13748797440. Its totient is φ = 10671264000.

The previous prime is 12156195551. The next prime is 12156195587. The reversal of 12156195571 is 17559165121.

12156195571 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12156195571 - 2⁵ = 12156195539 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12156195551) 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, 10560846 + ... + 10561996.

It is an arithmetic number, because the mean of its divisors is an integer number (429649920).

Almost surely, 2^12156195571 is an apocalyptic number.

12156195571 is a deficient number, since it is larger than the sum of its proper divisors (1592601869).

12156195571 is a wasteful number, since it uses less digits than its factorization.

12156195571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627.

The product of its digits is 94500, while the sum is 43.

The spelling of 12156195571 in words is "twelve billion, one hundred fifty-six million, one hundred ninety-five thousand, five hundred seventy-one".