161482661 has 2 divisors, whose sum is σ = 161482662. Its totient is φ = 161482660.

The previous prime is 161482639. The next prime is 161482681. The reversal of 161482661 is 166284161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148986436 + 12496225 = 12206^2 + 3535^2 .

It is a cyclic number.

It is not a de Polignac number, because 161482661 - 2¹⁰ = 161481637 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161482621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80741330 + 80741331.

It is an arithmetic number, because the mean of its divisors is an integer number (80741331).

Almost surely, 2^161482661 is an apocalyptic number.

It is an amenable number.

161482661 is a deficient number, since it is larger than the sum of its proper divisors (1).

161482661 is an equidigital number, since it uses as much as digits as its factorization.

161482661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 35.

The square root of 161482661 is about 12707.5828149967. The cubic root of 161482661 is about 544.5552705560. Note that the first 3 decimals are identical.

The spelling of 161482661 in words is "one hundred sixty-one million, four hundred eighty-two thousand, six hundred sixty-one".