12156610161 has 8 divisors (see below), whose sum is σ = 16209543520. Its totient is φ = 8104041792.

The previous prime is 12156610129. The next prime is 12156610163. The reversal of 12156610161 is 16101665121.

12156610161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12156610161 - 2⁵ = 12156610129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12156610163) 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, 691 + ... + 155928.

It is an arithmetic number, because the mean of its divisors is an integer number (2026192940).

Almost surely, 2^12156610161 is an apocalyptic number.

It is an amenable number.

12156610161 is a deficient number, since it is larger than the sum of its proper divisors (4052933359).

12156610161 is a wasteful number, since it uses less digits than its factorization.

12156610161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182495.

The product of its (nonzero) digits is 2160, while the sum is 30.

The spelling of 12156610161 in words is "twelve billion, one hundred fifty-six million, six hundred ten thousand, one hundred sixty-one".