It is a tau number, because it is divible by the number of its divisors (48).
It is an unprimeable number.
Almost surely, 265631264 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 65631264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87363360).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
65631264 is a wasteful number, since it uses less digits than its factorization.
65631264 is an evil number, because the sum of its binary digits is even.
The square root of 65631264 is about 8101.3124862580. The cubic root of 65631264 is about 403.3699947703.
The spelling of 65631264 in words is "sixty-five million, six hundred thirty-one thousand, two hundred sixty-four".