8000805370421 has 4 divisors (see below), whose sum is σ = 8000889404652. Its totient is φ = 8000721336192.

The previous prime is 8000805370339. The next prime is 8000805370447. The reversal of 8000805370421 is 1240735080008.

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 7720979182225 + 279826188196 = 2778665^2 + 528986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8000805370421 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 (8000805370471) 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 3 ways as a sum of consecutive naturals, for example, 41874140 + ... + 42064773.

It is an arithmetic number, because the mean of its divisors is an integer number (2000222351163).

Almost surely, 2^{8000805370421} is an apocalyptic number.

It is an amenable number.

8000805370421 is a deficient number, since it is larger than the sum of its proper divisors (84034231).

8000805370421 is an equidigital number, since it uses as much as digits as its factorization.

8000805370421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84034230.

The product of its (nonzero) digits is 53760, while the sum is 38.

The spelling of 8000805370421 in words is "eight trillion, eight hundred five million, three hundred seventy thousand, four hundred twenty-one".