1845210161 has 2 divisors, whose sum is σ = 1845210162. Its totient is φ = 1845210160.

The previous prime is 1845210151. The next prime is 1845210193. The reversal of 1845210161 is 1610125481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1843843600 + 1366561 = 42940^2 + 1169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1845210161 is a prime.

It is not a weakly prime, because it can be changed into another prime (1845210131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 922605080 + 922605081.

It is an arithmetic number, because the mean of its divisors is an integer number (922605081).

Almost surely, 2^1845210161 is an apocalyptic number.

It is an amenable number.

1845210161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1845210161 is an equidigital number, since it uses as much as digits as its factorization.

1845210161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 1845210161 is about 42955.9095003237. The cubic root of 1845210161 is about 1226.5406490329.

The spelling of 1845210161 in words is "one billion, eight hundred forty-five million, two hundred ten thousand, one hundred sixty-one".