800065407861 has 8 divisors (see below), whose sum is σ = 1185282085760. Its totient is φ = 533376938556.

The previous prime is 800065407847. The next prime is 800065407877. The reversal of 800065407861 is 168704560008.

It is a happy number.

It is not a de Polignac number, because 800065407861 - 2⁷ = 800065407733 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 (800065407821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14816026045 + ... + 14816026098.

It is an arithmetic number, because the mean of its divisors is an integer number (148160260720).

Almost surely, 2^800065407861 is an apocalyptic number.

It is an amenable number.

800065407861 is a deficient number, since it is larger than the sum of its proper divisors (385216677899).

800065407861 is a wasteful number, since it uses less digits than its factorization.

800065407861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29632052152 (or 29632052146 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

Adding to 800065407861 its reverse (168704560008), we get a palindrome (968769967869).

The spelling of 800065407861 in words is "eight hundred billion, sixty-five million, four hundred seven thousand, eight hundred sixty-one".