1605795841 has 4 divisors (see below), whose sum is σ = 1729318612. Its totient is φ = 1482273072.

The previous prime is 1605795839. The next prime is 1605795847. The reversal of 1605795841 is 1485975061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1485975061 = 89 ⋅16696349.

It can be written as a sum of positive squares in 2 ways, for example, as 864595216 + 741200625 = 29404^2 + 27225^2 .

It is a cyclic number.

It is not a de Polignac number, because 1605795841 - 2¹ = 1605795839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1605795791 and 1605795800.

It is not an unprimeable number, because it can be changed into a prime (1605795847) 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 in 3 ways as a sum of consecutive naturals, for example, 61761366 + ... + 61761391.

It is an arithmetic number, because the mean of its divisors is an integer number (432329653).

Almost surely, 2^1605795841 is an apocalyptic number.

It is an amenable number.

1605795841 is a deficient number, since it is larger than the sum of its proper divisors (123522771).

1605795841 is a wasteful number, since it uses less digits than its factorization.

1605795841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123522770.

The product of its (nonzero) digits is 302400, while the sum is 46.

The square root of 1605795841 is about 40072.3825221311. The cubic root of 1605795841 is about 1171.0176552736.

The spelling of 1605795841 in words is "one billion, six hundred five million, seven hundred ninety-five thousand, eight hundred forty-one".