210616160606161 has 4 divisors (see below), whose sum is σ = 211280564898612. Its totient is φ = 209951756313712.

The previous prime is 210616160606123. The next prime is 210616160606309. The reversal of 210616160606161 is 161606061616012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66896368160400 + 143719792445761 = 8179020^2 + 11988319^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210616160606161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210616160607161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332202145750 + ... + 332202146383.

It is an arithmetic number, because the mean of its divisors is an integer number (52820141224653).

Almost surely, 2^{210616160606161} is an apocalyptic number.

It is an amenable number.

210616160606161 is a deficient number, since it is larger than the sum of its proper divisors (664404292451).

210616160606161 is an equidigital number, since it uses as much as digits as its factorization.

210616160606161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664404292450.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 210616160606161 in words is "two hundred ten trillion, six hundred sixteen billion, one hundred sixty million, six hundred six thousand, one hundred sixty-one".