1645608960 is a `hidden beast` number, since 1 + 6 + 4 + 560 + 89 + 6 + 0 = 666.
It is a tau number, because it is divible by the number of its divisors (360).
It is a congruent number.
Almost surely, 21645608960 is an apocalyptic number.
1645608960 is a gapful number since it is divisible by the number (10) 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 1645608960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3045053088).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1645608960 is an frugal number, since it uses more digits than its factorization.
1645608960 is an evil number, because the sum of its binary digits is even.
The square root of 1645608960 is about 40566.1060492624. The cubic root of 1645608960 is about 1180.6165886055.
The spelling of 1645608960 in words is "one billion, six hundred forty-five million, six hundred eight thousand, nine hundred sixty".