806817495421 has 16 divisors (see below), whose sum is σ = 923686844544. Its totient is φ = 690351390144.

The previous prime is 806817495359. The next prime is 806817495499. The reversal of 806817495421 is 124594718608.

It is a cyclic number.

It is not a de Polignac number, because 806817495421 - 2⁹ = 806817494909 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 (806817415421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12374910 + ... + 12439936.

It is an arithmetic number, because the mean of its divisors is an integer number (57730427784).

Almost surely, 2^806817495421 is an apocalyptic number.

It is an amenable number.

806817495421 is a deficient number, since it is larger than the sum of its proper divisors (116869349123).

806817495421 is a wasteful number, since it uses less digits than its factorization.

806817495421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68100.

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 806817495421 in words is "eight hundred six billion, eight hundred seventeen million, four hundred ninety-five thousand, four hundred twenty-one".