404004040445 has 4 divisors (see below), whose sum is σ = 484804848540. Its totient is φ = 323203232352.

The previous prime is 404004040441. The next prime is 404004040471. The reversal of 404004040445 is 544040400404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 199068561241 + 204935479204 = 446171^2 + 452698^2 .

It is a cyclic number.

It is not a de Polignac number, because 404004040445 - 2² = 404004040441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404004040441) 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, 40400404040 + ... + 40400404049.

It is an arithmetic number, because the mean of its divisors is an integer number (121201212135).

Almost surely, 2^404004040445 is an apocalyptic number.

It is an amenable number.

404004040445 is a deficient number, since it is larger than the sum of its proper divisors (80800808095).

404004040445 is an equidigital number, since it uses as much as digits as its factorization.

404004040445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80800808094.

The product of its (nonzero) digits is 20480, while the sum is 29.

Adding to 404004040445 its reverse (544040400404), we get a palindrome (948044440849).

The spelling of 404004040445 in words is "four hundred four billion, four million, forty thousand, four hundred forty-five".