1641089633 has 2 divisors, whose sum is σ = 1641089634. Its totient is φ = 1641089632.

The previous prime is 1641089623. The next prime is 1641089701. The reversal of 1641089633 is 3369801461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1341903424 + 299186209 = 36632^2 + 17297^2 .

It is a cyclic number.

It is not a de Polignac number, because 1641089633 - 2¹⁰ = 1641088609 is a prime.

It is not a weakly prime, because it can be changed into another prime (1641089623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820544816 + 820544817.

It is an arithmetic number, because the mean of its divisors is an integer number (820544817).

Almost surely, 2^1641089633 is an apocalyptic number.

It is an amenable number.

1641089633 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641089633 is an equidigital number, since it uses as much as digits as its factorization.

1641089633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 1641089633 is about 40510.3645132946. The cubic root of 1641089633 is about 1179.5348240651.

The spelling of 1641089633 in words is "one billion, six hundred forty-one million, eighty-nine thousand, six hundred thirty-three".