818609497888 has 192 divisors, whose sum is σ = 2042137923840. Its totient is φ = 314323587072.

The previous prime is 818609497861. The next prime is 818609497889. The reversal of 818609497888 is 888794906818.

It is not an unprimeable number, because it can be changed into a prime (818609497889) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45135670 + ... + 45153802.

It is an arithmetic number, because the mean of its divisors is an integer number (10636135020).

Almost surely, 2^818609497888 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 818609497888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1021068961920).

818609497888 is an abundant number, since it is smaller than the sum of its proper divisors (1223528425952).

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

818609497888 is a wasteful number, since it uses less digits than its factorization.

818609497888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18619 (or 18611 counting only the distinct ones).

The product of its (nonzero) digits is 445906944, while the sum is 76.

The spelling of 818609497888 in words is "eight hundred eighteen billion, six hundred nine million, four hundred ninety-seven thousand, eight hundred eighty-eight".