404493845617 has 16 divisors (see below), whose sum is σ = 415138090752. Its totient is φ = 393907288320.

The previous prime is 404493845599. The next prime is 404493845621. The reversal of 404493845617 is 716548394404.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 404493845617 - 2¹⁹ = 404493321329 is a prime.

It is a super-2 number, since 2×404493845617² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404493845627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26297433 + ... + 26312809.

It is an arithmetic number, because the mean of its divisors is an integer number (25946130672).

Almost surely, 2^404493845617 is an apocalyptic number.

It is an amenable number.

404493845617 is a deficient number, since it is larger than the sum of its proper divisors (10644245135).

404493845617 is a wasteful number, since it uses less digits than its factorization.

404493845617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17208.

The product of its (nonzero) digits is 11612160, while the sum is 55.

The spelling of 404493845617 in words is "four hundred four billion, four hundred ninety-three million, eight hundred forty-five thousand, six hundred seventeen".