545656 has 8 divisors (see below), whose sum is σ = 1023120. Its totient is φ = 272824.

The previous prime is 545651. The next prime is 545663. The reversal of 545656 is 656545.

545656 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a tau number, because it is divible by the number of its divisors (8).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545651) by changing a digit.

545656 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34096 + ... + 34111.

It is an arithmetic number, because the mean of its divisors is an integer number (127890).

2⁵⁴⁵⁶⁵⁶ is an apocalyptic number.

It is an amenable number.

545656 is a deficient number, since it is larger than the sum of its proper divisors (477464).

545656 is a wasteful number, since it uses less digits than its factorization.

545656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68213 (or 68209 counting only the distinct ones).

The product of its digits is 18000, while the sum is 31.

The square root of 545656 is about 738.6853186574. The cubic root of 545656 is about 81.7158517173.

Subtracting 545656 from its reverse (656545), we obtain a square (110889 = 333²).

The spelling of 545656 in words is "five hundred forty-five thousand, six hundred fifty-six".