509949887905 has 8 divisors (see below), whose sum is σ = 624959862912. Its totient is φ = 399279912048.

The previous prime is 509949887903. The next prime is 509949887933. The reversal of 509949887905 is 509788949905.

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 509949887905 - 2¹ = 509949887903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (509949887903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1084999527 + ... + 1084999996.

It is an arithmetic number, because the mean of its divisors is an integer number (78119982864).

Almost surely, 2^509949887905 is an apocalyptic number.

It is an amenable number.

509949887905 is a deficient number, since it is larger than the sum of its proper divisors (115009975007).

509949887905 is a wasteful number, since it uses less digits than its factorization.

509949887905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2169999575.

The product of its (nonzero) digits is 293932800, while the sum is 73.

The spelling of 509949887905 in words is "five hundred nine billion, nine hundred forty-nine million, eight hundred eighty-seven thousand, nine hundred five".