6509681019 has 16 divisors (see below), whose sum is σ = 9660096000. Its totient is φ = 4332531528.

The previous prime is 6509680999. The next prime is 6509681051. The reversal of 6509681019 is 9101869056.

It is not a de Polignac number, because 6509681019 - 2²⁰ = 6508632443 is a prime.

It is a super-2 number, since 2×6509681019² = 84751893938257756722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6509681819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185079 + ... + 217424.

It is an arithmetic number, because the mean of its divisors is an integer number (603756000).

Almost surely, 2^6509681019 is an apocalyptic number.

6509681019 is a deficient number, since it is larger than the sum of its proper divisors (3150414981).

6509681019 is a wasteful number, since it uses less digits than its factorization.

6509681019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403111 (or 403105 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 6509681019 is about 80682.5942753454. The cubic root of 6509681019 is about 1867.1816447375.

The spelling of 6509681019 in words is "six billion, five hundred nine million, six hundred eighty-one thousand, nineteen".