811398856704 has 304 divisors, whose sum is σ = 2312936140608. Its totient is φ = 252128002048.

The previous prime is 811398856693. The next prime is 811398856711. The reversal of 811398856704 is 407658893118.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1831599907 + ... + 1831600349.

Almost surely, 2^811398856704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 811398856704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1156468070304).

811398856704 is an abundant number, since it is smaller than the sum of its proper divisors (1501537283904).

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

811398856704 is an equidigital number, since it uses as much as digits as its factorization.

811398856704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636 (or 602 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 60.

The spelling of 811398856704 in words is "eight hundred eleven billion, three hundred ninety-eight million, eight hundred fifty-six thousand, seven hundred four".