443019994065 has 36 divisors (see below), whose sum is σ = 844056836532. Its totient is φ = 214797570240.

The previous prime is 443019994063. The next prime is 443019994091. The reversal of 443019994065 is 560499910344.

It is a happy number.

443019994065 is a `hidden beast` number, since 4 + 43 + 0 + 199 + 9 + 406 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 236861315856 + 206158678209 = 486684^2 + 454047^2 .

It is not a de Polignac number, because 443019994065 - 2¹ = 443019994063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (443019994063) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 40675914 + ... + 40686803.

It is an arithmetic number, because the mean of its divisors is an integer number (23446023237).

Almost surely, 2^443019994065 is an apocalyptic number.

443019994065 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

443019994065 is a deficient number, since it is larger than the sum of its proper divisors (401036842467).

443019994065 is a wasteful number, since it uses less digits than its factorization.

443019994065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81362750 (or 81362736 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 443019994065 in words is "four hundred forty-three billion, nineteen million, nine hundred ninety-four thousand, sixty-five".