6565498249 has 2 divisors, whose sum is σ = 6565498250. Its totient is φ = 6565498248.

The previous prime is 6565498231. The next prime is 6565498273. The reversal of 6565498249 is 9428945656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5942097225 + 623401024 = 77085^2 + 24968^2 .

It is a cyclic number.

It is not a de Polignac number, because 6565498249 - 2⁹ = 6565497737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6565498193 and 6565498202.

It is not a weakly prime, because it can be changed into another prime (6565492249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3282749124 + 3282749125.

It is an arithmetic number, because the mean of its divisors is an integer number (3282749125).

Almost surely, 2^6565498249 is an apocalyptic number.

It is an amenable number.

6565498249 is a deficient number, since it is larger than the sum of its proper divisors (1).

6565498249 is an equidigital number, since it uses as much as digits as its factorization.

6565498249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18662400, while the sum is 58.

The square root of 6565498249 is about 81027.7622114791. The cubic root of 6565498249 is about 1872.5031772557.

The spelling of 6565498249 in words is "six billion, five hundred sixty-five million, four hundred ninety-eight thousand, two hundred forty-nine".