65065728000 has 1536 divisors, whose sum is σ = 286191360000. Its totient is φ = 13005619200.

The previous prime is 65065727963. The next prime is 65065728053. The reversal of 65065728000 is 82756056.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (1536).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 65065728000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3424511991 + ... + 3424512009.

It is an arithmetic number, because the mean of its divisors is an integer number (186322500).

Almost surely, 2^65065728000 is an apocalyptic number.

65065728000 is a gapful number since it is divisible by the number (60) 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 65065728000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143095680000).

65065728000 is an abundant number, since it is smaller than the sum of its proper divisors (221125632000).

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

65065728000 is a wasteful number, since it uses less digits than its factorization.

65065728000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 65065728000 in words is "sixty-five billion, sixty-five million, seven hundred twenty-eight thousand".