65440254441 has 16 divisors (see below), whose sum is σ = 88301664000. Its totient is φ = 43104994128.

The previous prime is 65440254431. The next prime is 65440254443. The reversal of 65440254441 is 14445204456.

It is not a de Polignac number, because 65440254441 - 2⁵ = 65440254409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65440254441.

It is not an unprimeable number, because it can be changed into a prime (65440254443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147291 + ... + 390608.

It is an arithmetic number, because the mean of its divisors is an integer number (5518854000).

Almost surely, 2^65440254441 is an apocalyptic number.

It is an amenable number.

65440254441 is a deficient number, since it is larger than the sum of its proper divisors (22861409559).

65440254441 is a wasteful number, since it uses less digits than its factorization.

65440254441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538388.

The product of its (nonzero) digits is 307200, while the sum is 39.

Adding to 65440254441 its reverse (14445204456), we get a palindrome (79885458897).

The spelling of 65440254441 in words is "sixty-five billion, four hundred forty million, two hundred fifty-four thousand, four hundred forty-one".