611564 has 12 divisors (see below), whose sum is σ = 1093344. Its totient is φ = 299184.

The previous prime is 611561. The next prime is 611587. The reversal of 611564 is 465116.

611564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (611561) 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, 1439 + ... + 1814.

It is an arithmetic number, because the mean of its divisors is an integer number (91112).

2⁶¹¹⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

611564 is a deficient number, since it is larger than the sum of its proper divisors (481780).

611564 is a wasteful number, since it uses less digits than its factorization.

611564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3304 (or 3302 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 611564 is about 782.0255750294. The cubic root of 611564 is about 84.8816808213.

The spelling of 611564 in words is "six hundred eleven thousand, five hundred sixty-four".