1641228163 has 4 divisors (see below), whose sum is σ = 1641317128. Its totient is φ = 1641139200.

The previous prime is 1641228131. The next prime is 1641228209. The reversal of 1641228163 is 3618221461.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1641228163 - 2⁵ = 1641228131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1641228763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5313 + ... + 57538.

It is an arithmetic number, because the mean of its divisors is an integer number (410329282).

Almost surely, 2^1641228163 is an apocalyptic number.

1641228163 is a deficient number, since it is larger than the sum of its proper divisors (88965).

1641228163 is an equidigital number, since it uses as much as digits as its factorization.

1641228163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88964.

The product of its digits is 13824, while the sum is 34.

The square root of 1641228163 is about 40512.0742865630. The cubic root of 1641228163 is about 1179.5680126569.

The spelling of 1641228163 in words is "one billion, six hundred forty-one million, two hundred twenty-eight thousand, one hundred sixty-three".