443516640544561 has 4 divisors (see below), whose sum is σ = 443524548255552. Its totient is φ = 443508732833572.

The previous prime is 443516640544541. The next prime is 443516640544631. The reversal of 443516640544561 is 165445046615344.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 443516640544561 - 2⁷ = 443516640544433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 443516640544496 and 443516640544505.

It is not an unprimeable number, because it can be changed into a prime (443516640544531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3953771365 + ... + 3953883538.

It is an arithmetic number, because the mean of its divisors is an integer number (110881137063888).

Almost surely, 2^{443516640544561} is an apocalyptic number.

It is an amenable number.

443516640544561 is a deficient number, since it is larger than the sum of its proper divisors (7907710991).

443516640544561 is an equidigital number, since it uses as much as digits as its factorization.

443516640544561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7907710990.

The product of its (nonzero) digits is 82944000, while the sum is 58.

The spelling of 443516640544561 in words is "four hundred forty-three trillion, five hundred sixteen billion, six hundred forty million, five hundred forty-four thousand, five hundred sixty-one".