1845638353 has 6 divisors (see below), whose sum is σ = 1998531654. Its totient is φ = 1703666016.

The previous prime is 1845638339. The next prime is 1845638401. The reversal of 1845638353 is 3538365481.

It can be written as a sum of positive squares in 3 ways, for example, as 214124689 + 1631513664 = 14633^2 + 40392^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1845638353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1845638323) 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 5 ways as a sum of consecutive naturals, for example, 5460300 + ... + 5460637.

It is an arithmetic number, because the mean of its divisors is an integer number (333088609).

Almost surely, 2^1845638353 is an apocalyptic number.

1845638353 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1845638353 is a deficient number, since it is larger than the sum of its proper divisors (152893301).

1845638353 is a wasteful number, since it uses less digits than its factorization.

1845638353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10920963 (or 10920950 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 46.

The square root of 1845638353 is about 42960.8932984406. The cubic root of 1845638353 is about 1226.6355170476.

The spelling of 1845638353 in words is "one billion, eight hundred forty-five million, six hundred thirty-eight thousand, three hundred fifty-three".