65816447444 has 24 divisors (see below), whose sum is σ = 133040734848. Its totient is φ = 28156768640.

The previous prime is 65816447443. The next prime is 65816447453. The reversal of 65816447444 is 44474461856.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65816447443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43994204 + ... + 43995699.

It is an arithmetic number, because the mean of its divisors is an integer number (5543363952).

Almost surely, 2^65816447444 is an apocalyptic number.

It is an amenable number.

65816447444 is an abundant number, since it is smaller than the sum of its proper divisors (67224287404).

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

65816447444 is a wasteful number, since it uses less digits than its factorization.

65816447444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87989935 (or 87989933 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 53.

The spelling of 65816447444 in words is "sixty-five billion, eight hundred sixteen million, four hundred forty-seven thousand, four hundred forty-four".