65645703444 has 24 divisors (see below), whose sum is σ = 153227723040. Its totient is φ = 21874127584.

The previous prime is 65645703433. The next prime is 65645703449. The reversal of 65645703444 is 44430754656.

It is a super-3 number, since 3×65645703444³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 65645703393 and 65645703402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65645703449) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 936459 + ... + 1004114.

It is an arithmetic number, because the mean of its divisors is an integer number (6384488460).

Almost surely, 2^65645703444 is an apocalyptic number.

It is an amenable number.

65645703444 is an abundant number, since it is smaller than the sum of its proper divisors (87582019596).

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

65645703444 is a wasteful number, since it uses less digits than its factorization.

65645703444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943399 (or 1943397 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 48.

The spelling of 65645703444 in words is "sixty-five billion, six hundred forty-five million, seven hundred three thousand, four hundred forty-four".