608559561 has 15 divisors (see below), whose sum is σ = 909414583. Its totient is φ = 405558360.

The previous prime is 608559551. The next prime is 608559587. The reversal of 608559561 is 165955806.

It is a happy number.

The square root of 608559561 is 24669.

It is a perfect power (a square), and thus also a powerful number.

608559561 is a `hidden beast` number, since 6 + 0 + 85 + 5 + 9 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 180069561 + 428490000 = 13419^2 + 20700^2 .

It is not a de Polignac number, because 608559561 - 2⁵ = 608559529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (608559541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 220651 + ... + 223391.

Almost surely, 2^608559561 is an apocalyptic number.

608559561 is the 24669-th square number.

608559561 is the 12335-th centered octagonal number.

It is an amenable number.

608559561 is a deficient number, since it is larger than the sum of its proper divisors (300855022).

608559561 is an frugal number, since it uses more digits than its factorization.

608559561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5494 (or 2744 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 45.

The cubic root of 608559561 is about 847.4245276985.

The spelling of 608559561 in words is "six hundred eight million, five hundred fifty-nine thousand, five hundred sixty-one".