1381625856 is a `hidden beast` number, since 1 + 3 + 8 + 1 + 62 + 585 + 6 = 666.
It is a tau number, because it is divible by the number of its divisors (312).
It is a congruent number.
Almost surely, 21381625856 is an apocalyptic number.
1381625856 is a gapful number since it is divisible by the number (16) 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 1381625856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2277425640).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1381625856 is an equidigital number, since it uses as much as digits as its factorization.
1381625856 is an odious number, because the sum of its binary digits is odd.
The square root of 1381625856 is about 37170.2280864673. The cubic root of 1381625856 is about 1113.7733380592.
The spelling of 1381625856 in words is "one billion, three hundred eighty-one million, six hundred twenty-five thousand, eight hundred fifty-six".