8102625409 has 2 divisors, whose sum is σ = 8102625410. Its totient is φ = 8102625408.

The previous prime is 8102625367. The next prime is 8102625413. The reversal of 8102625409 is 9045262018.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6610503025 + 1492122384 = 81305^2 + 38628^2 .

It is a cyclic number.

It is not a de Polignac number, because 8102625409 - 2⁷ = 8102625281 is a prime.

It is not a weakly prime, because it can be changed into another prime (8102625439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4051312704 + 4051312705.

It is an arithmetic number, because the mean of its divisors is an integer number (4051312705).

Almost surely, 2^8102625409 is an apocalyptic number.

It is an amenable number.

8102625409 is a deficient number, since it is larger than the sum of its proper divisors (1).

8102625409 is an equidigital number, since it uses as much as digits as its factorization.

8102625409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 8102625409 is about 90014.5844238588. The cubic root of 8102625409 is about 2008.5158064736.

The spelling of 8102625409 in words is "eight billion, one hundred two million, six hundred twenty-five thousand, four hundred nine".