404660413421 has 16 divisors (see below), whose sum is σ = 458964249408. Its totient is φ = 353543836800.

The previous prime is 404660413397. The next prime is 404660413433. The reversal of 404660413421 is 124314066404.

It is not a de Polignac number, because 404660413421 - 2¹⁰ = 404660412397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404660413471) 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, 6665690 + ... + 6726123.

It is an arithmetic number, because the mean of its divisors is an integer number (28685265588).

Almost surely, 2^404660413421 is an apocalyptic number.

404660413421 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

404660413421 is a deficient number, since it is larger than the sum of its proper divisors (54303835987).

404660413421 is a wasteful number, since it uses less digits than its factorization.

404660413421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13391932.

The product of its (nonzero) digits is 55296, while the sum is 35.

Adding to 404660413421 its reverse (124314066404), we get a palindrome (528974479825).

The spelling of 404660413421 in words is "four hundred four billion, six hundred sixty million, four hundred thirteen thousand, four hundred twenty-one".