8158325081 has 2 divisors, whose sum is σ = 8158325082. Its totient is φ = 8158325080.

The previous prime is 8158325047. The next prime is 8158325129. The reversal of 8158325081 is 1805238518.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7964670025 + 193655056 = 89245^2 + 13916^2 .

It is a cyclic number.

It is not a de Polignac number, because 8158325081 - 2¹⁸ = 8158062937 is a prime.

It is a super-2 number, since 2×8158325081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8158328081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4079162540 + 4079162541.

It is an arithmetic number, because the mean of its divisors is an integer number (4079162541).

Almost surely, 2^8158325081 is an apocalyptic number.

It is an amenable number.

8158325081 is a deficient number, since it is larger than the sum of its proper divisors (1).

8158325081 is an equidigital number, since it uses as much as digits as its factorization.

8158325081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 76800, while the sum is 41.

The square root of 8158325081 is about 90323.4470168184. The cubic root of 8158325081 is about 2013.1076636568.

The spelling of 8158325081 in words is "eight billion, one hundred fifty-eight million, three hundred twenty-five thousand, eighty-one".