609864556 has 48 divisors (see below), whose sum is σ = 1233388800. Its totient is φ = 258464448.

The previous prime is 609864553. The next prime is 609864589. The reversal of 609864556 is 655468906.

It is a happy number.

609864556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (609864553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1455315 + ... + 1455733.

It is an arithmetic number, because the mean of its divisors is an integer number (25695600).

Almost surely, 2^609864556 is an apocalyptic number.

It is an amenable number.

609864556 is an abundant number, since it is smaller than the sum of its proper divisors (623524244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

609864556 is a wasteful number, since it uses less digits than its factorization.

609864556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886 (or 884 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 49.

The square root of 609864556 is about 24695.4359346014. The cubic root of 609864556 is about 848.0298342269.

The spelling of 609864556 in words is "six hundred nine million, eight hundred sixty-four thousand, five hundred fifty-six".