65443865328 has 80 divisors (see below), whose sum is σ = 189784832160. Its totient is φ = 21589714944.

The previous prime is 65443865309. The next prime is 65443865339. The reversal of 65443865328 is 82356834456.

65443865328 is a `hidden beast` number, since 6 + 544 + 3 + 8 + 65 + 32 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

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, 738975 + ... + 822782.

It is an arithmetic number, because the mean of its divisors is an integer number (2372310402).

Almost surely, 2^65443865328 is an apocalyptic number.

It is an amenable number.

65443865328 is an abundant number, since it is smaller than the sum of its proper divisors (124340966832).

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

65443865328 is a wasteful number, since it uses less digits than its factorization.

65443865328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561871 (or 1561859 counting only the distinct ones).

The product of its digits is 16588800, while the sum is 54.

The spelling of 65443865328 in words is "sixty-five billion, four hundred forty-three million, eight hundred sixty-five thousand, three hundred twenty-eight".