65288989824 has 128 divisors (see below), whose sum is σ = 175220496000. Its totient is φ = 21538750464.

The previous prime is 65288989817. The next prime is 65288989853. The reversal of 65288989824 is 42898988256.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15051784 + ... + 15056120.

It is an arithmetic number, because the mean of its divisors is an integer number (1368910125).

Almost surely, 2^65288989824 is an apocalyptic number.

65288989824 is a gapful number since it is divisible by the number (64) 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 65288989824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87610248000).

65288989824 is an abundant number, since it is smaller than the sum of its proper divisors (109931506176).

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

65288989824 is a wasteful number, since it uses less digits than its factorization.

65288989824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4750 (or 4738 counting only the distinct ones).

The product of its digits is 159252480, while the sum is 69.

The spelling of 65288989824 in words is "sixty-five billion, two hundred eighty-eight million, nine hundred eighty-nine thousand, eight hundred twenty-four".