8646799991 has 2 divisors, whose sum is σ = 8646799992. Its totient is φ = 8646799990.

The previous prime is 8646799939. The next prime is 8646800033. The reversal of 8646799991 is 1999976468.

8646799991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8646799991 - 2²² = 8642605687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8646790991) 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, 4323399995 + 4323399996.

It is an arithmetic number, because the mean of its divisors is an integer number (4323399996).

Almost surely, 2^8646799991 is an apocalyptic number.

8646799991 is a deficient number, since it is larger than the sum of its proper divisors (1).

8646799991 is an equidigital number, since it uses as much as digits as its factorization.

8646799991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52907904, while the sum is 68.

The square root of 8646799991 is about 92988.1712423682. The cubic root of 8646799991 is about 2052.5093198952.

The spelling of 8646799991 in words is "eight billion, six hundred forty-six million, seven hundred ninety-nine thousand, nine hundred ninety-one".