818128964000 has 48 divisors (see below), whose sum is σ = 2010142874376. Its totient is φ = 327251584000.

The previous prime is 818128963987. The next prime is 818128964041. The reversal of 818128964000 is 469821818.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 387934648336 + 430194315664 = 622844^2 + 655892^2 .

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 7 ways as a sum of consecutive naturals, for example, 102262121 + ... + 102270120.

Almost surely, 2^818128964000 is an apocalyptic number.

818128964000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

818128964000 is an abundant number, since it is smaller than the sum of its proper divisors (1192013910376).

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

818128964000 is a wasteful number, since it uses less digits than its factorization.

818128964000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204532266 (or 204532248 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 47.

The spelling of 818128964000 in words is "eight hundred eighteen billion, one hundred twenty-eight million, nine hundred sixty-four thousand".