6298440649 has 2 divisors, whose sum is σ = 6298440650. Its totient is φ = 6298440648.

The previous prime is 6298440559. The next prime is 6298440671. The reversal of 6298440649 is 9460448926.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6171202249 + 127238400 = 78557^2 + 11280^2 .

It is a cyclic number.

It is not a de Polignac number, because 6298440649 - 2²⁷ = 6164222921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6298440596 and 6298440605.

It is not a weakly prime, because it can be changed into another prime (6298440679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3149220324 + 3149220325.

It is an arithmetic number, because the mean of its divisors is an integer number (3149220325).

Almost surely, 2^6298440649 is an apocalyptic number.

It is an amenable number.

6298440649 is a deficient number, since it is larger than the sum of its proper divisors (1).

6298440649 is an equidigital number, since it uses as much as digits as its factorization.

6298440649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2985984, while the sum is 52.

The square root of 6298440649 is about 79362.7157360432. The cubic root of 6298440649 is about 1846.7623575372.

The spelling of 6298440649 in words is "six billion, two hundred ninety-eight million, four hundred forty thousand, six hundred forty-nine".