161606600061061 has 2 divisors, whose sum is σ = 161606600061062. Its totient is φ = 161606600061060.

The previous prime is 161606600060953. The next prime is 161606600061073. The reversal of 161606600061061 is 160160006606161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143798326660836 + 17808273400225 = 11991594^2 + 4219985^2 .

It is an emirp because it is prime and its reverse (160160006606161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161606600061061 - 2¹¹ = 161606600059013 is a prime.

It is a super-2 number, since 2×161606600061061² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161606600061461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80803300030530 + 80803300030531.

It is an arithmetic number, because the mean of its divisors is an integer number (80803300030531).

Almost surely, 2^{161606600061061} is an apocalyptic number.

It is an amenable number.

161606600061061 is a deficient number, since it is larger than the sum of its proper divisors (1).

161606600061061 is an equidigital number, since it uses as much as digits as its factorization.

161606600061061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 40.

The spelling of 161606600061061 in words is "one hundred sixty-one trillion, six hundred six billion, six hundred million, sixty-one thousand, sixty-one".