8461568865 has 48 divisors (see below), whose sum is σ = 14447881728. Its totient is φ = 4227846144.

The previous prime is 8461568861. The next prime is 8461568903. The reversal of 8461568865 is 5688651648.

It is a happy number.

It is not a de Polignac number, because 8461568865 - 2² = 8461568861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8461568861) 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 47 ways as a sum of consecutive naturals, for example, 962329 + ... + 971081.

It is an arithmetic number, because the mean of its divisors is an integer number (300997536).

Almost surely, 2^8461568865 is an apocalyptic number.

8461568865 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8461568865 is a deficient number, since it is larger than the sum of its proper divisors (5986312863).

8461568865 is a wasteful number, since it uses less digits than its factorization.

8461568865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9018 (or 9001 counting only the distinct ones).

The product of its digits is 11059200, while the sum is 57.

The square root of 8461568865 is about 91986.7863608682. The cubic root of 8461568865 is about 2037.7471658201.

The spelling of 8461568865 in words is "eight billion, four hundred sixty-one million, five hundred sixty-eight thousand, eight hundred sixty-five".