6499099181 has 2 divisors, whose sum is σ = 6499099182. Its totient is φ = 6499099180.

The previous prime is 6499099153. The next prime is 6499099183. The reversal of 6499099181 is 1819909946.

6499099181 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4012082281 + 2487016900 = 63341^2 + 49870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6499099181 is a prime.

It is a super-2 number, since 2×6499099181² = 84476580328949741522, which contains 22 as substring.

Together with 6499099183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6499099183) 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, 3249549590 + 3249549591.

It is an arithmetic number, because the mean of its divisors is an integer number (3249549591).

Almost surely, 2^6499099181 is an apocalyptic number.

It is an amenable number.

6499099181 is a deficient number, since it is larger than the sum of its proper divisors (1).

6499099181 is an equidigital number, since it uses as much as digits as its factorization.

6499099181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1259712, while the sum is 56.

The square root of 6499099181 is about 80616.9906471334. The cubic root of 6499099181 is about 1866.1693611700.

The spelling of 6499099181 in words is "six billion, four hundred ninety-nine million, ninety-nine thousand, one hundred eighty-one".