8561646906 has 8 divisors (see below), whose sum is σ = 17123293824. Its totient is φ = 2853882300.

The previous prime is 8561646893. The next prime is 8561646911. The reversal of 8561646906 is 6096461658.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

8561646906 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 713470570 + ... + 713470581.

It is an arithmetic number, because the mean of its divisors is an integer number (2140411728).

Almost surely, 2^8561646906 is an apocalyptic number.

8561646906 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

8561646906 is a wasteful number, since it uses less digits than its factorization.

8561646906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1426941156.

The product of its (nonzero) digits is 1866240, while the sum is 51.

The square root of 8561646906 is about 92529.1678661383. The cubic root of 8561646906 is about 2045.7494244165.

The spelling of 8561646906 in words is "eight billion, five hundred sixty-one million, six hundred forty-six thousand, nine hundred six".