509902243671 has 4 divisors (see below), whose sum is σ = 679869658232. Its totient is φ = 339934829112.

The previous prime is 509902243661. The next prime is 509902243679. The reversal of 509902243671 is 176342209905.

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

It is not a de Polignac number, because 509902243671 - 2⁶ = 509902243607 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 509902243671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509902243679) 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, 84983707276 + ... + 84983707281.

It is an arithmetic number, because the mean of its divisors is an integer number (169967414558).

Almost surely, 2^509902243671 is an apocalyptic number.

509902243671 is a deficient number, since it is larger than the sum of its proper divisors (169967414561).

509902243671 is a wasteful number, since it uses less digits than its factorization.

509902243671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169967414560.

The product of its (nonzero) digits is 816480, while the sum is 48.

The spelling of 509902243671 in words is "five hundred nine billion, nine hundred two million, two hundred forty-three thousand, six hundred seventy-one".