161050506061 has 2 divisors, whose sum is σ = 161050506062. Its totient is φ = 161050506060.

The previous prime is 161050506059. The next prime is 161050506109. The reversal of 161050506061 is 160605050161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101895024100 + 59155481961 = 319210^2 + 243219^2 .

It is a cyclic number.

It is not a de Polignac number, because 161050506061 - 2¹ = 161050506059 is a prime.

Together with 161050506059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161050506031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80525253030 + 80525253031.

It is an arithmetic number, because the mean of its divisors is an integer number (80525253031).

Almost surely, 2^161050506061 is an apocalyptic number.

It is an amenable number.

161050506061 is a deficient number, since it is larger than the sum of its proper divisors (1).

161050506061 is an equidigital number, since it uses as much as digits as its factorization.

161050506061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 161050506061 in words is "one hundred sixty-one billion, fifty million, five hundred six thousand, sixty-one".