809694439873 has 8 divisors (see below), whose sum is σ = 891119867616. Its totient is φ = 729571819200.

The previous prime is 809694439861. The next prime is 809694439921. The reversal of 809694439873 is 378934496908.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 809694439873 - 2¹³ = 809694431681 is a prime.

It is a super-2 number, since 2×809694439873² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (809694439843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325700463 + ... + 325702948.

It is an arithmetic number, because the mean of its divisors is an integer number (111389983452).

Almost surely, 2^809694439873 is an apocalyptic number.

It is an amenable number.

809694439873 is a deficient number, since it is larger than the sum of its proper divisors (81425427743).

809694439873 is a wasteful number, since it uses less digits than its factorization.

809694439873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651403535.

The product of its (nonzero) digits is 282175488, while the sum is 70.

The spelling of 809694439873 in words is "eight hundred nine billion, six hundred ninety-four million, four hundred thirty-nine thousand, eight hundred seventy-three".