518649965 has 8 divisors (see below), whose sum is σ = 623800320. Its totient is φ = 413973072.

The previous prime is 518649953. The next prime is 518649983. The reversal of 518649965 is 569946815.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 518649965 - 2⁸ = 518649709 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 115949 + ... + 120338.

It is an arithmetic number, because the mean of its divisors is an integer number (77975040).

Almost surely, 2^518649965 is an apocalyptic number.

It is an amenable number.

518649965 is a deficient number, since it is larger than the sum of its proper divisors (105150355).

518649965 is a wasteful number, since it uses less digits than its factorization.

518649965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236731.

The product of its digits is 2332800, while the sum is 53.

The square root of 518649965 is about 22773.8877884300. The cubic root of 518649965 is about 803.4486357152.

The spelling of 518649965 in words is "five hundred eighteen million, six hundred forty-nine thousand, nine hundred sixty-five".