8108557091 has 2 divisors, whose sum is σ = 8108557092. Its totient is φ = 8108557090.

The previous prime is 8108557081. The next prime is 8108557111. The reversal of 8108557091 is 1907558018.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8108557091 - 2¹⁴ = 8108540707 is a prime.

It is not a weakly prime, because it can be changed into another prime (8108557081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4054278545 + 4054278546.

It is an arithmetic number, because the mean of its divisors is an integer number (4054278546).

Almost surely, 2^8108557091 is an apocalyptic number.

8108557091 is a deficient number, since it is larger than the sum of its proper divisors (1).

8108557091 is an equidigital number, since it uses as much as digits as its factorization.

8108557091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 44.

The square root of 8108557091 is about 90047.5268455497. The cubic root of 8108557091 is about 2009.0058110658.

The spelling of 8108557091 in words is "eight billion, one hundred eight million, five hundred fifty-seven thousand, ninety-one".