508685838871 has 4 divisors (see below), whose sum is σ = 581355244432. Its totient is φ = 436016433312.

The previous prime is 508685838827. The next prime is 508685838911. The reversal of 508685838871 is 178838586805.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-508685838871 is a prime.

It is a super-2 number, since 2×508685838871² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 508685838797 and 508685838806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (508685838821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36334702770 + ... + 36334702783.

It is an arithmetic number, because the mean of its divisors is an integer number (145338811108).

Almost surely, 2^508685838871 is an apocalyptic number.

508685838871 is a deficient number, since it is larger than the sum of its proper divisors (72669405561).

508685838871 is an equidigital number, since it uses as much as digits as its factorization.

508685838871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72669405560.

The product of its (nonzero) digits is 103219200, while the sum is 67.

The spelling of 508685838871 in words is "five hundred eight billion, six hundred eighty-five million, eight hundred thirty-eight thousand, eight hundred seventy-one".