161156160056166 has 128 divisors (see below), whose sum is σ = 364367459635200. Its totient is φ = 47069662738560.

The previous prime is 161156160056119. The next prime is 161156160056219. The reversal of 161156160056166 is 661650061651161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13511871295 + ... + 13511883221.

It is an arithmetic number, because the mean of its divisors is an integer number (2846620778400).

Almost surely, 2^{161156160056166} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161156160056166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182183729817600).

161156160056166 is an abundant number, since it is smaller than the sum of its proper divisors (203211299579034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161156160056166 is a wasteful number, since it uses less digits than its factorization.

161156160056166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23594.

The product of its (nonzero) digits is 1166400, while the sum is 51.

The spelling of 161156160056166 in words is "one hundred sixty-one trillion, one hundred fifty-six billion, one hundred sixty million, fifty-six thousand, one hundred sixty-six".