1641612163 has 2 divisors, whose sum is σ = 1641612164. Its totient is φ = 1641612162.

The previous prime is 1641612149. The next prime is 1641612169. The reversal of 1641612163 is 3612161461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1641612163 - 2⁵ = 1641612131 is a prime.

It is not a weakly prime, because it can be changed into another prime (1641612169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820806081 + 820806082.

It is an arithmetic number, because the mean of its divisors is an integer number (820806082).

Almost surely, 2^1641612163 is an apocalyptic number.

1641612163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641612163 is an equidigital number, since it uses as much as digits as its factorization.

1641612163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 1641612163 is about 40516.8133371814. The cubic root of 1641612163 is about 1179.6600004348.

The spelling of 1641612163 in words is "one billion, six hundred forty-one million, six hundred twelve thousand, one hundred sixty-three".