161656600005069 has 32 divisors (see below), whose sum is σ = 234255902496000. Its totient is φ = 98566613959680.

The previous prime is 161656600005067. The next prime is 161656600005079. The reversal of 161656600005069 is 960500006656161.

It is a happy number.

It is not a de Polignac number, because 161656600005069 - 2¹ = 161656600005067 is a prime.

It is a super-2 number, since 2×161656600005069² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161656600005067) 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, 272749957 + ... + 273342005.

It is an arithmetic number, because the mean of its divisors is an integer number (7320496953000).

Almost surely, 2^{161656600005069} is an apocalyptic number.

It is an amenable number.

161656600005069 is a deficient number, since it is larger than the sum of its proper divisors (72599302490931).

161656600005069 is a wasteful number, since it uses less digits than its factorization.

161656600005069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656405.

The product of its (nonzero) digits is 1749600, while the sum is 51.

The spelling of 161656600005069 in words is "one hundred sixty-one trillion, six hundred fifty-six billion, six hundred million, five thousand, sixty-nine".