606561563656404 has 18 divisors (see below), whose sum is σ = 1533252841464890. Its totient is φ = 202187187885456.

The previous prime is 606561563656403. The next prime is 606561563656441. The reversal of 606561563656404 is 404656365165606.

606561563656404 is a `hidden beast` number, since 6 + 0 + 6 + 5 + 6 + 1 + 5 + 63 + 6 + 564 + 0 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 315103326322500 + 291458237333904 = 17751150^2 + 17072148^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×606561563656404² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (606561563656403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8424466161859 + ... + 8424466161930.

Almost surely, 2^{606561563656404} is an apocalyptic number.

It is an amenable number.

606561563656404 is an abundant number, since it is smaller than the sum of its proper divisors (926691277808486).

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

606561563656404 is a wasteful number, since it uses less digits than its factorization.

606561563656404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16848932323799 (or 16848932323794 counting only the distinct ones).

The product of its (nonzero) digits is 279936000, while the sum is 63.

The spelling of 606561563656404 in words is "six hundred six trillion, five hundred sixty-one billion, five hundred sixty-three million, six hundred fifty-six thousand, four hundred four".