6519145249 has 2 divisors, whose sum is σ = 6519145250. Its totient is φ = 6519145248.

The previous prime is 6519145223. The next prime is 6519145289. The reversal of 6519145249 is 9425419156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5199131025 + 1320014224 = 72105^2 + 36332^2 .

It is a cyclic number.

It is not a de Polignac number, because 6519145249 - 2³¹ = 4371661601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6519145199 and 6519145208.

It is not a weakly prime, because it can be changed into another prime (6519145289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3259572624 + 3259572625.

It is an arithmetic number, because the mean of its divisors is an integer number (3259572625).

Almost surely, 2^6519145249 is an apocalyptic number.

It is an amenable number.

6519145249 is a deficient number, since it is larger than the sum of its proper divisors (1).

6519145249 is an equidigital number, since it uses as much as digits as its factorization.

6519145249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 388800, while the sum is 46.

The square root of 6519145249 is about 80741.2239751169. The cubic root of 6519145249 is about 1868.0860863635.

The spelling of 6519145249 in words is "six billion, five hundred nineteen million, one hundred forty-five thousand, two hundred forty-nine".