818872320000 has 1200 divisors, whose sum is σ = 3360917755800. Its totient is φ = 176160768000.

The previous prime is 818872319989. The next prime is 818872320023. The reversal of 818872320000 is 23278818.

It is a tau number, because it is divible by the number of its divisors (1200).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 48168959992 + ... + 48168960008.

Almost surely, 2^818872320000 is an apocalyptic number.

818872320000 is a gapful number since it is divisible by the number (80) 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 818872320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1680458877900).

818872320000 is an abundant number, since it is smaller than the sum of its proper divisors (2542045435800).

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

818872320000 is an frugal number, since it uses more digits than its factorization.

818872320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 39.

Adding to 818872320000 its reverse (23278818), we get a palindrome (818895598818).

The spelling of 818872320000 in words is "eight hundred eighteen billion, eight hundred seventy-two million, three hundred twenty thousand".