8319467561 has 2 divisors, whose sum is σ = 8319467562. Its totient is φ = 8319467560.

The previous prime is 8319467543. The next prime is 8319467593. The reversal of 8319467561 is 1657649138.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7187817961 + 1131649600 = 84781^2 + 33640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8319467561 is a prime.

It is not a weakly prime, because it can be changed into another prime (8319437561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4159733780 + 4159733781.

It is an arithmetic number, because the mean of its divisors is an integer number (4159733781).

Almost surely, 2^8319467561 is an apocalyptic number.

It is an amenable number.

8319467561 is a deficient number, since it is larger than the sum of its proper divisors (1).

8319467561 is an equidigital number, since it uses as much as digits as its factorization.

8319467561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 50.

The square root of 8319467561 is about 91211.1153368930. The cubic root of 8319467561 is about 2026.2755819122.

The spelling of 8319467561 in words is "eight billion, three hundred nineteen million, four hundred sixty-seven thousand, five hundred sixty-one".