156166112172161 has 32 divisors (see below), whose sum is σ = 200573409738240. Its totient is φ = 118180608758784.

The previous prime is 156166112172157. The next prime is 156166112172227. The reversal of 156166112172161 is 161271211661651.

It is not a de Polignac number, because 156166112172161 - 2² = 156166112172157 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (156166112172101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32124035 + ... + 36664503.

It is an arithmetic number, because the mean of its divisors is an integer number (6267919054320).

Almost surely, 2^{156166112172161} is an apocalyptic number.

It is an amenable number.

156166112172161 is a deficient number, since it is larger than the sum of its proper divisors (44407297566079).

156166112172161 is a wasteful number, since it uses less digits than its factorization.

156166112172161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4556945.

The product of its digits is 181440, while the sum is 47.

The spelling of 156166112172161 in words is "one hundred fifty-six trillion, one hundred sixty-six billion, one hundred twelve million, one hundred seventy-two thousand, one hundred sixty-one".