811101557008 has 80 divisors (see below), whose sum is σ = 1662670725120. Its totient is φ = 382248332928.

The previous prime is 811101556997. The next prime is 811101557033. The reversal of 811101557008 is 800755101118.

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 15 ways as a sum of consecutive naturals, for example, 48832641 + ... + 48849247.

It is an arithmetic number, because the mean of its divisors is an integer number (20783384064).

Almost surely, 2^811101557008 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 811101557008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (831335362560).

811101557008 is an abundant number, since it is smaller than the sum of its proper divisors (851569168112).

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

811101557008 is a wasteful number, since it uses less digits than its factorization.

811101557008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17444 (or 17438 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 37.

The spelling of 811101557008 in words is "eight hundred eleven billion, one hundred one million, five hundred fifty-seven thousand, eight".