506708324821 has 4 divisors (see below), whose sum is σ = 506808134572. Its totient is φ = 506608515072.

The previous prime is 506708324777. The next prime is 506708324851. The reversal of 506708324821 is 128423807605.

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

It can be written as a sum of positive squares in 2 ways, for example, as 374928434596 + 131779890225 = 612314^2 + 363015^2 .

It is a cyclic number.

It is not a de Polignac number, because 506708324821 - 2¹⁵ = 506708292053 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 (506708324851) 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, 49897260 + ... + 49907413.

It is an arithmetic number, because the mean of its divisors is an integer number (126702033643).

Almost surely, 2^506708324821 is an apocalyptic number.

It is an amenable number.

506708324821 is a deficient number, since it is larger than the sum of its proper divisors (99809751).

506708324821 is an equidigital number, since it uses as much as digits as its factorization.

506708324821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99809750.

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 506708324821 in words is "five hundred six billion, seven hundred eight million, three hundred twenty-four thousand, eight hundred twenty-one".