8686258561 has 2 divisors, whose sum is σ = 8686258562. Its totient is φ = 8686258560.

The previous prime is 8686258549. The next prime is 8686258573. The reversal of 8686258561 is 1658526868.

It is a balanced prime because it is at equal distance from previous prime (8686258549) and next prime (8686258573).

It can be written as a sum of positive squares in only one way, i.e., 7196298561 + 1489960000 = 84831^2 + 38600^2 .

It is a cyclic number.

It is not a de Polignac number, because 8686258561 - 2¹⁹ = 8685734273 is a prime.

It is not a weakly prime, because it can be changed into another prime (8686256561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4343129280 + 4343129281.

It is an arithmetic number, because the mean of its divisors is an integer number (4343129281).

Almost surely, 2^8686258561 is an apocalyptic number.

It is an amenable number.

8686258561 is a deficient number, since it is larger than the sum of its proper divisors (1).

8686258561 is an equidigital number, since it uses as much as digits as its factorization.

8686258561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5529600, while the sum is 55.

The square root of 8686258561 is about 93200.0995761271. The cubic root of 8686258561 is about 2055.6267043489.

The spelling of 8686258561 in words is "eight billion, six hundred eighty-six million, two hundred fifty-eight thousand, five hundred sixty-one".