404414540521 has 16 divisors (see below), whose sum is σ = 419606288640. Its totient is φ = 389478510720.

The previous prime is 404414540443. The next prime is 404414540533. The reversal of 404414540521 is 125045414404.

It is a cyclic number.

It is not a de Polignac number, because 404414540521 - 2²⁵ = 404380986089 is a prime.

It is a super-2 number, since 2×404414540521² (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 (404414540581) 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, 22362735 + ... + 22380811.

It is an arithmetic number, because the mean of its divisors is an integer number (26225393040).

Almost surely, 2^404414540521 is an apocalyptic number.

404414540521 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

404414540521 is a deficient number, since it is larger than the sum of its proper divisors (15191748119).

404414540521 is a wasteful number, since it uses less digits than its factorization.

404414540521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25104.

The product of its (nonzero) digits is 51200, while the sum is 34.

Adding to 404414540521 its reverse (125045414404), we get a palindrome (529459954925).

The spelling of 404414540521 in words is "four hundred four billion, four hundred fourteen million, five hundred forty thousand, five hundred twenty-one".