404443357561 has 12 divisors (see below), whose sum is σ = 422863120512. Its totient is φ = 386794149896.

The previous prime is 404443357559. The next prime is 404443357567. The reversal of 404443357561 is 165753344404.

It is not a de Polignac number, because 404443357561 - 2¹ = 404443357559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404443357567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3265020 + ... + 3386626.

It is an arithmetic number, because the mean of its divisors is an integer number (35238593376).

Almost surely, 2^404443357561 is an apocalyptic number.

It is an amenable number.

404443357561 is a deficient number, since it is larger than the sum of its proper divisors (18419762951).

404443357561 is a wasteful number, since it uses less digits than its factorization.

404443357561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127940 (or 127917 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 46.

The spelling of 404443357561 in words is "four hundred four billion, four hundred forty-three million, three hundred fifty-seven thousand, five hundred sixty-one".