545644 has 12 divisors (see below), whose sum is σ = 1041768. Its totient is φ = 248000.

The previous prime is 545641. The next prime is 545647. The reversal of 545644 is 446545.

It is an interprime number because it is at equal distance from previous prime (545641) and next prime (545647).

It is not an unprimeable number, because it can be changed into a prime (545641) 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, 6157 + ... + 6244.

It is an arithmetic number, because the mean of its divisors is an integer number (86814).

2⁵⁴⁵⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

545644 is a deficient number, since it is larger than the sum of its proper divisors (496124).

545644 is a wasteful number, since it uses less digits than its factorization.

545644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12416 (or 12414 counting only the distinct ones).

The product of its digits is 9600, while the sum is 28.

The square root of 545644 is about 738.6771960742. The cubic root of 545644 is about 81.7152526846.

Subtracting from 545644 its reverse (446545), we obtain a palindrome (99099).

The spelling of 545644 in words is "five hundred forty-five thousand, six hundred forty-four".