5618645 has 4 divisors (see below), whose sum is σ = 6742380. Its totient is φ = 4494912.

The previous prime is 5618633. The next prime is 5618671. The reversal of 5618645 is 5468165.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5468165 = 5 ⋅1093633.

It can be written as a sum of positive squares in 2 ways, for example, as 1582564 + 4036081 = 1258^2 + 2009^2 .

It is a cyclic number.

It is not a de Polignac number, because 5618645 - 2⁶ = 5618581 is a prime.

It is a d-powerful number, because it can be written as 5⁹ + 6 + 1 + 8⁵ + 6⁸ + 4 + 5⁹ .

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, 561860 + ... + 561869.

It is an arithmetic number, because the mean of its divisors is an integer number (1685595).

Almost surely, 2^5618645 is an apocalyptic number.

It is an amenable number.

5618645 is a deficient number, since it is larger than the sum of its proper divisors (1123735).

5618645 is a wasteful number, since it uses less digits than its factorization.

5618645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123734.

The product of its digits is 28800, while the sum is 35.

The square root of 5618645 is about 2370.3681148716. The cubic root of 5618645 is about 177.7776650028. Note that the first 3 decimals are identical.

The spelling of 5618645 in words is "five million, six hundred eighteen thousand, six hundred forty-five".