1845816485 has 4 divisors (see below), whose sum is σ = 2214979788. Its totient is φ = 1476653184.

The previous prime is 1845816473. The next prime is 1845816487. The reversal of 1845816485 is 5846185481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5846185481 = 37 ⋅158005013.

It can be written as a sum of positive squares in 2 ways, for example, as 343323841 + 1502492644 = 18529^2 + 38762^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1845816485 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1845816487) 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, 184581644 + ... + 184581653.

It is an arithmetic number, because the mean of its divisors is an integer number (553744947).

Almost surely, 2^1845816485 is an apocalyptic number.

It is an amenable number.

1845816485 is a deficient number, since it is larger than the sum of its proper divisors (369163303).

1845816485 is an equidigital number, since it uses as much as digits as its factorization.

1845816485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369163302.

The product of its digits is 1228800, while the sum is 50.

The square root of 1845816485 is about 42962.9664362227. The cubic root of 1845816485 is about 1226.6749787346.

It can be divided in two parts, 18458 and 16485, that added together give a palindrome (34943).

The spelling of 1845816485 in words is "one billion, eight hundred forty-five million, eight hundred sixteen thousand, four hundred eighty-five".