1845442645 has 4 divisors (see below), whose sum is σ = 2214531180. Its totient is φ = 1476354112.

The previous prime is 1845442631. The next prime is 1845442693. The reversal of 1845442645 is 5462445481.

It is a happy number.

1845442645 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 830765329 + 1014677316 = 28823^2 + 31854^2 .

It is a cyclic number.

It is not a de Polignac number, because 1845442645 - 2⁷ = 1845442517 is a prime.

It is a congruent 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, 184544260 + ... + 184544269.

It is an arithmetic number, because the mean of its divisors is an integer number (553632795).

Almost surely, 2^1845442645 is an apocalyptic number.

It is an amenable number.

1845442645 is a deficient number, since it is larger than the sum of its proper divisors (369088535).

1845442645 is an equidigital number, since it uses as much as digits as its factorization.

1845442645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369088534.

The product of its digits is 614400, while the sum is 43.

The square root of 1845442645 is about 42958.6154921222. The cubic root of 1845442645 is about 1226.5921588117.

The spelling of 1845442645 in words is "one billion, eight hundred forty-five million, four hundred forty-two thousand, six hundred forty-five".