161656600005068 has 48 divisors (see below), whose sum is σ = 342339467722560. Its totient is φ = 65204529401856.

The previous prime is 161656600005067. The next prime is 161656600005079. The reversal of 161656600005068 is 860500006656161.

It is a super-2 number, since 2×161656600005068² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161656600005067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17022146 + ... + 24760182.

It is an arithmetic number, because the mean of its divisors is an integer number (7132072244220).

Almost surely, 2^{161656600005068} is an apocalyptic number.

It is an amenable number.

161656600005068 is an abundant number, since it is smaller than the sum of its proper divisors (180682867717492).

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

161656600005068 is a wasteful number, since it uses less digits than its factorization.

161656600005068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7781954 (or 7781952 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 50.

The spelling of 161656600005068 in words is "one hundred sixty-one trillion, six hundred fifty-six billion, six hundred million, five thousand, sixty-eight".