809852406724 has 9 divisors (see below), whose sum is σ = 1417244861487. Its totient is φ = 404925303444.

The previous prime is 809852406719. The next prime is 809852406733. The reversal of 809852406724 is 427604258908.

The square root of 809852406724 is 899918.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1574857 + ... + 2024815.

Almost surely, 2^809852406724 is an apocalyptic number.

809852406724 is the 899918-th square number.

It is an amenable number.

809852406724 is a deficient number, since it is larger than the sum of its proper divisors (607392454763).

809852406724 is an frugal number, since it uses more digits than its factorization.

809852406724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899922 (or 449961 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 55.

The spelling of 809852406724 in words is "eight hundred nine billion, eight hundred fifty-two million, four hundred six thousand, seven hundred twenty-four".