404421001621452 has 72 divisors (see below), whose sum is σ = 1031345327520144. Its totient is φ = 133612447481856.

The previous prime is 404421001621423. The next prime is 404421001621517. The reversal of 404421001621452 is 254126100124404.

404421001621452 is a `hidden beast` number, since 4 + 0 + 4 + 4 + 21 + 0 + 0 + 1 + 621 + 4 + 5 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 375194508 + ... + 376270860.

It is an arithmetic number, because the mean of its divisors is an integer number (14324240660002).

Almost surely, 2^{404421001621452} is an apocalyptic number.

It is an amenable number.

404421001621452 is an abundant number, since it is smaller than the sum of its proper divisors (626924325898692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404421001621452 is a wasteful number, since it uses less digits than its factorization.

404421001621452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1168839 (or 1168834 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 36.

Adding to 404421001621452 its reverse (254126100124404), we get a palindrome (658547101745856).

The spelling of 404421001621452 in words is "four hundred four trillion, four hundred twenty-one billion, one million, six hundred twenty-one thousand, four hundred fifty-two".