509734928666 has 16 divisors (see below), whose sum is σ = 784399839840. Its totient is φ = 248346412080.

The previous prime is 509734928657. The next prime is 509734928693. The reversal of 509734928666 is 666829437905.

It is a Curzon 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, 19511036 + ... + 19537143.

It is an arithmetic number, because the mean of its divisors is an integer number (49024989990).

Almost surely, 2^509734928666 is an apocalyptic number.

509734928666 is a deficient number, since it is larger than the sum of its proper divisors (274664911174).

509734928666 is a wasteful number, since it uses less digits than its factorization.

509734928666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39048349.

The product of its (nonzero) digits is 117573120, while the sum is 65.

The spelling of 509734928666 in words is "five hundred nine billion, seven hundred thirty-four million, nine hundred twenty-eight thousand, six hundred sixty-six".