509319873943 has 12 divisors (see below), whose sum is σ = 526327138200. Its totient is φ = 492845621040.

The previous prime is 509319873941. The next prime is 509319873949. The reversal of 509319873943 is 349378913905.

It is not a de Polignac number, because 509319873943 - 2¹ = 509319873941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509319873941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16609021 + ... + 16639657.

It is an arithmetic number, because the mean of its divisors is an integer number (43860594850).

Almost surely, 2^509319873943 is an apocalyptic number.

509319873943 is a deficient number, since it is larger than the sum of its proper divisors (17007264257).

509319873943 is a wasteful number, since it uses less digits than its factorization.

509319873943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47998 (or 47967 counting only the distinct ones).

The product of its (nonzero) digits is 22044960, while the sum is 61.

The spelling of 509319873943 in words is "five hundred nine billion, three hundred nineteen million, eight hundred seventy-three thousand, nine hundred forty-three".