51819264000 is a `hidden beast` number, since 5 + 1 + 8 + 1 + 9 + 2 + 640 + 0 + 0 = 666.
It is a tau number, because it is divible by the number of its divisors (1728).
It is a congruent number.
It is an unprimeable number.
Almost surely, 251819264000 is an apocalyptic number.
51819264000 is a gapful number since it is divisible by the number (50) 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 51819264000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119288136240).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
51819264000 is an equidigital number, since it uses as much as digits as its factorization.
51819264000 is an odious number, because the sum of its binary digits is odd.
The spelling of 51819264000 in words is "fifty-one billion, eight hundred nineteen million, two hundred sixty-four thousand".