808123989321808 has 120 divisors (see below), whose sum is σ = 1688589590313600. Its totient is φ = 373309097920512.

The previous prime is 808123989321773. The next prime is 808123989321827.

808123989321808 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 642486063 + ... + 643742641.

It is an arithmetic number, because the mean of its divisors is an integer number (14071579919280).

Almost surely, 2^{808123989321808} 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 808123989321808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (844294795156800).

808123989321808 is an abundant number, since it is smaller than the sum of its proper divisors (880465600991792).

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

808123989321808 is a wasteful number, since it uses less digits than its factorization.

808123989321808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257029 (or 1256850 counting only the distinct ones).

The product of its (nonzero) digits is 95551488, while the sum is 70.

The spelling of 808123989321808 in words is "eight hundred eight trillion, one hundred twenty-three billion, nine hundred eighty-nine million, three hundred twenty-one thousand, eight hundred eight".