6349777909 has 2 divisors, whose sum is σ = 6349777910. Its totient is φ = 6349777908.

The previous prime is 6349777883. The next prime is 6349777961. The reversal of 6349777909 is 9097779436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4930146225 + 1419631684 = 70215^2 + 37678^2 .

It is a cyclic number.

It is not a de Polignac number, because 6349777909 - 2²⁹ = 5812906997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6349777309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3174888954 + 3174888955.

It is an arithmetic number, because the mean of its divisors is an integer number (3174888955).

Almost surely, 2^6349777909 is an apocalyptic number.

It is an amenable number.

6349777909 is a deficient number, since it is larger than the sum of its proper divisors (1).

6349777909 is an equidigital number, since it uses as much as digits as its factorization.

6349777909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18003384, while the sum is 61.

The square root of 6349777909 is about 79685.4937174891. The cubic root of 6349777909 is about 1851.7663100380.

The spelling of 6349777909 in words is "six billion, three hundred forty-nine million, seven hundred seventy-seven thousand, nine hundred nine".