811218935208 has 256 divisors, whose sum is σ = 2388839040000. Its totient is φ = 226902988800.

The previous prime is 811218935171. The next prime is 811218935231. The reversal of 811218935208 is 802539812118.

811218935208 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 186527818 + ... + 186532166.

It is an arithmetic number, because the mean of its divisors is an integer number (9331402500).

Almost surely, 2^811218935208 is an apocalyptic number.

811218935208 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 811218935208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1194419520000).

811218935208 is an abundant number, since it is smaller than the sum of its proper divisors (1577620104792).

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

811218935208 is a wasteful number, since it uses less digits than its factorization.

811218935208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5336 (or 5332 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 48.

The spelling of 811218935208 in words is "eight hundred eleven billion, two hundred eighteen million, nine hundred thirty-five thousand, two hundred eight".