818428720000 has 160 divisors (see below), whose sum is σ = 2107689229800. Its totient is φ = 316081920000.

The previous prime is 818428719973. The next prime is 818428720027. The reversal of 818428720000 is 27824818.

It is an interprime number because it is at equal distance from previous prime (818428719973) and next prime (818428720027).

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

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 19 ways as a sum of consecutive naturals, for example, 2143615 + ... + 2496385.

Almost surely, 2^818428720000 is an apocalyptic number.

818428720000 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 818428720000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1053844614900).

818428720000 is an abundant number, since it is smaller than the sum of its proper divisors (1289260509800).

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

818428720000 is an equidigital number, since it uses as much as digits as its factorization.

818428720000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352834 (or 352807 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 40.

The spelling of 818428720000 in words is "eight hundred eighteen billion, four hundred twenty-eight million, seven hundred twenty thousand".