6408589849 has 2 divisors, whose sum is σ = 6408589850. Its totient is φ = 6408589848.

The previous prime is 6408589813. The next prime is 6408589867. The reversal of 6408589849 is 9489858046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5826574224 + 582015625 = 76332^2 + 24125^2 .

It is a cyclic number.

It is not a de Polignac number, because 6408589849 - 2⁷ = 6408589721 is a prime.

It is not a weakly prime, because it can be changed into another prime (6408589879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3204294924 + 3204294925.

It is an arithmetic number, because the mean of its divisors is an integer number (3204294925).

Almost surely, 2^6408589849 is an apocalyptic number.

It is an amenable number.

6408589849 is a deficient number, since it is larger than the sum of its proper divisors (1).

6408589849 is an equidigital number, since it uses as much as digits as its factorization.

6408589849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19906560, while the sum is 61.

The square root of 6408589849 is about 80053.6685542893. The cubic root of 6408589849 is about 1857.4657985052.

The spelling of 6408589849 in words is "six billion, four hundred eight million, five hundred eighty-nine thousand, eight hundred forty-nine".