1845823645 has 4 divisors (see below), whose sum is σ = 2214988380. Its totient is φ = 1476658912.

The previous prime is 1845823631. The next prime is 1845823663. The reversal of 1845823645 is 5463285481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5463285481 = 59 ⋅92598059.

It can be written as a sum of positive squares in 2 ways, for example, as 244703449 + 1601120196 = 15643^2 + 40014^2 .

It is a cyclic number.

It is not a de Polignac number, because 1845823645 - 2⁷ = 1845823517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1845823595 and 1845823604.

It is a congruent number.

It is an unprimeable number.

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, 184582360 + ... + 184582369.

It is an arithmetic number, because the mean of its divisors is an integer number (553747095).

Almost surely, 2^1845823645 is an apocalyptic number.

It is an amenable number.

1845823645 is a deficient number, since it is larger than the sum of its proper divisors (369164735).

1845823645 is an equidigital number, since it uses as much as digits as its factorization.

1845823645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369164734.

The product of its digits is 921600, while the sum is 46.

The square root of 1845823645 is about 42963.0497637214. The cubic root of 1845823645 is about 1226.6765648405.

The spelling of 1845823645 in words is "one billion, eight hundred forty-five million, eight hundred twenty-three thousand, six hundred forty-five".