8068559381 has 2 divisors, whose sum is σ = 8068559382. Its totient is φ = 8068559380.

The previous prime is 8068559333. The next prime is 8068559417. The reversal of 8068559381 is 1839558608.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5191202500 + 2877356881 = 72050^2 + 53641^2 .

It is a cyclic number.

It is not a de Polignac number, because 8068559381 - 2¹⁴ = 8068542997 is a prime.

It is a super-2 number, since 2×8068559381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8068559881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4034279690 + 4034279691.

It is an arithmetic number, because the mean of its divisors is an integer number (4034279691).

Almost surely, 2^8068559381 is an apocalyptic number.

It is an amenable number.

8068559381 is a deficient number, since it is larger than the sum of its proper divisors (1).

8068559381 is an equidigital number, since it uses as much as digits as its factorization.

8068559381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2073600, while the sum is 53.

The square root of 8068559381 is about 89825.1600666539. The cubic root of 8068559381 is about 2005.6970382191.

The spelling of 8068559381 in words is "eight billion, sixty-eight million, five hundred fifty-nine thousand, three hundred eighty-one".