4686945561 has 6 divisors (see below), whose sum is σ = 6770032490. Its totient is φ = 3124630368.

The previous prime is 4686945559. The next prime is 4686945607. The reversal of 4686945561 is 1655496864.

4686945561 is a `hidden beast` number, since 4 + 6 + 86 + 9 + 4 + 556 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4548153600 + 138791961 = 67440^2 + 11781^2 .

It is not a de Polignac number, because 4686945561 - 2¹ = 4686945559 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4686945498 and 4686945507.

It is not an unprimeable number, because it can be changed into a prime (4686945961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 260385856 + ... + 260385873.

Almost surely, 2^4686945561 is an apocalyptic number.

It is an amenable number.

4686945561 is a deficient number, since it is larger than the sum of its proper divisors (2083086929).

4686945561 is a wasteful number, since it uses less digits than its factorization.

4686945561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520771735 (or 520771732 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The square root of 4686945561 is about 68461.2705184471. The cubic root of 4686945561 is about 1673.5163886508.

The spelling of 4686945561 in words is "four billion, six hundred eighty-six million, nine hundred forty-five thousand, five hundred sixty-one".