509146818 has 16 divisors (see below), whose sum is σ = 1018948896. Its totient is φ = 169606400.

The previous prime is 509146793. The next prime is 509146829. The reversal of 509146818 is 818641905.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 509146818.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16896 + ... + 36107.

It is an arithmetic number, because the mean of its divisors is an integer number (63684306).

Almost surely, 2^509146818 is an apocalyptic number.

509146818 is an abundant number, since it is smaller than the sum of its proper divisors (509802078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

509146818 is a wasteful number, since it uses less digits than its factorization.

509146818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54609.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 509146818 is about 22564.2819074749. The cubic root of 509146818 is about 798.5111987657.

The spelling of 509146818 in words is "five hundred nine million, one hundred forty-six thousand, eight hundred eighteen".