509868288667 has 4 divisors (see below), whose sum is σ = 520716550176. Its totient is φ = 499020027160.

The previous prime is 509868288647. The next prime is 509868288701. The reversal of 509868288667 is 766882868905.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 509868288667 - 2¹¹ = 509868286619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 509868288667.

It is not an unprimeable number, because it can be changed into a prime (509868288647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5424130684 + ... + 5424130777.

It is an arithmetic number, because the mean of its divisors is an integer number (130179137544).

Almost surely, 2^509868288667 is an apocalyptic number.

509868288667 is a deficient number, since it is larger than the sum of its proper divisors (10848261509).

509868288667 is a wasteful number, since it uses less digits than its factorization.

509868288667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10848261508.

The product of its (nonzero) digits is 557383680, while the sum is 73.

The spelling of 509868288667 in words is "five hundred nine billion, eight hundred sixty-eight million, two hundred eighty-eight thousand, six hundred sixty-seven".