493664565 has 16 divisors (see below), whose sum is σ = 795168000. Its totient is φ = 261519552.

The previous prime is 493664557. The next prime is 493664579. The reversal of 493664565 is 565466394.

It is a happy number.

It is not a de Polignac number, because 493664565 - 2³ = 493664557 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 (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108205 + ... + 112674.

It is an arithmetic number, because the mean of its divisors is an integer number (49698000).

Almost surely, 2^493664565 is an apocalyptic number.

It is an amenable number.

493664565 is a deficient number, since it is larger than the sum of its proper divisors (301503435).

493664565 is a wasteful number, since it uses less digits than its factorization.

493664565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221036.

The product of its digits is 2332800, while the sum is 48.

The square root of 493664565 is about 22218.5635224242. The cubic root of 493664565 is about 790.3339745849. Note that the first 3 decimals are identical.

The spelling of 493664565 in words is "four hundred ninety-three million, six hundred sixty-four thousand, five hundred sixty-five".