8516706561 has 24 divisors (see below), whose sum is σ = 13488418944. Its totient is φ = 5135427360.

The previous prime is 8516706559. The next prime is 8516706571. The reversal of 8516706561 is 1656076158.

8516706561 is a `hidden beast` number, since 8 + 5 + 16 + 70 + 6 + 561 = 666.

8516706561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8516706561 - 2¹ = 8516706559 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8516706551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 198841 + ... + 237846.

It is an arithmetic number, because the mean of its divisors is an integer number (562017456).

Almost surely, 2^8516706561 is an apocalyptic number.

It is an amenable number.

8516706561 is a deficient number, since it is larger than the sum of its proper divisors (4971712383).

8516706561 is a wasteful number, since it uses less digits than its factorization.

8516706561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436901 (or 436898 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 8516706561 is about 92286.0041447239. The cubic root of 8516706561 is about 2042.1637429798.

The spelling of 8516706561 in words is "eight billion, five hundred sixteen million, seven hundred six thousand, five hundred sixty-one".