800821398208 has 56 divisors (see below), whose sum is σ = 1711503326288. Its totient is φ = 369581239296.

The previous prime is 800821398187. The next prime is 800821398211. The reversal of 800821398208 is 802893128008.

It is a super-2 number, since 2×800821398208² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13784710 + ... + 13842682.

It is an arithmetic number, because the mean of its divisors is an integer number (30562559398).

Almost surely, 2^800821398208 is an apocalyptic number.

It is an amenable number.

800821398208 is an abundant number, since it is smaller than the sum of its proper divisors (910681928080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

800821398208 is a wasteful number, since it uses less digits than its factorization.

800821398208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74601 (or 74591 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 49.

The spelling of 800821398208 in words is "eight hundred billion, eight hundred twenty-one million, three hundred ninety-eight thousand, two hundred eight".