1641820163 has 2 divisors, whose sum is σ = 1641820164. Its totient is φ = 1641820162.

The previous prime is 1641820093. The next prime is 1641820183. The reversal of 1641820163 is 3610281461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1641820163 - 2¹⁶ = 1641754627 is a prime.

It is not a weakly prime, because it can be changed into another prime (1641820183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820910081 + 820910082.

It is an arithmetic number, because the mean of its divisors is an integer number (820910082).

Almost surely, 2^1641820163 is an apocalyptic number.

1641820163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641820163 is an equidigital number, since it uses as much as digits as its factorization.

1641820163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1641820163 is about 40519.3800915068. The cubic root of 1641820163 is about 1179.7098211585.

The spelling of 1641820163 in words is "one billion, six hundred forty-one million, eight hundred twenty thousand, one hundred sixty-three".