513665245209 has 8 divisors (see below), whose sum is σ = 685175863072. Its totient is φ = 342299062080.

The previous prime is 513665245183. The next prime is 513665245243. The reversal of 513665245209 is 902542566315.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 513665245209 - 2¹² = 513665241113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513665265209) 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 in 7 ways as a sum of consecutive naturals, for example, 36100384 + ... + 36114609.

It is an arithmetic number, because the mean of its divisors is an integer number (85646982884).

Almost surely, 2^513665245209 is an apocalyptic number.

It is an amenable number.

513665245209 is a deficient number, since it is larger than the sum of its proper divisors (171510617863).

513665245209 is a wasteful number, since it uses less digits than its factorization.

513665245209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72217367.

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 513665245209 in words is "five hundred thirteen billion, six hundred sixty-five million, two hundred forty-five thousand, two hundred nine".