8461808609 has 2 divisors, whose sum is σ = 8461808610. Its totient is φ = 8461808608.

The previous prime is 8461808603. The next prime is 8461808653. The reversal of 8461808609 is 9068081648.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6499584400 + 1962224209 = 80620^2 + 44297^2 .

It is a cyclic number.

It is not a de Polignac number, because 8461808609 - 2¹² = 8461804513 is a prime.

It is not a weakly prime, because it can be changed into another prime (8461808603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4230904304 + 4230904305.

It is an arithmetic number, because the mean of its divisors is an integer number (4230904305).

Almost surely, 2^8461808609 is an apocalyptic number.

It is an amenable number.

8461808609 is a deficient number, since it is larger than the sum of its proper divisors (1).

8461808609 is an equidigital number, since it uses as much as digits as its factorization.

8461808609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 663552, while the sum is 50.

The square root of 8461808609 is about 91988.0894953254. The cubic root of 8461808609 is about 2037.7664109921.

The spelling of 8461808609 in words is "eight billion, four hundred sixty-one million, eight hundred eight thousand, six hundred nine".