1641799105 has 4 divisors (see below), whose sum is σ = 1970158932. Its totient is φ = 1313439280.

The previous prime is 1641799097. The next prime is 1641799129. The reversal of 1641799105 is 5019971461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5019971461 = 103 ⋅48737587.

It can be written as a sum of positive squares in 2 ways, for example, as 928481841 + 713317264 = 30471^2 + 26708^2 .

It is not a de Polignac number, because 1641799105 - 2³ = 1641799097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164179906 + ... + 164179915.

It is an arithmetic number, because the mean of its divisors is an integer number (492539733).

Almost surely, 2^1641799105 is an apocalyptic number.

It is an amenable number.

1641799105 is a deficient number, since it is larger than the sum of its proper divisors (328359827).

1641799105 is an equidigital number, since it uses as much as digits as its factorization.

1641799105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328359826.

The product of its (nonzero) digits is 68040, while the sum is 43.

The square root of 1641799105 is about 40519.1202397091. The cubic root of 1641799105 is about 1179.7047774807.

The spelling of 1641799105 in words is "one billion, six hundred forty-one million, seven hundred ninety-nine thousand, one hundred five".