404021425315543 has 16 divisors (see below), whose sum is σ = 462129504842304. Its totient is φ = 346011108986880.

The previous prime is 404021425315517. The next prime is 404021425315567. The reversal of 404021425315543 is 345513524120404.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404021425315543 is a prime.

It is a super-2 number, since 2×404021425315543² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 404021425315543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404021425315843) 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, 57392571 + ... + 64046467.

It is an arithmetic number, because the mean of its divisors is an integer number (28883094052644).

Almost surely, 2^{404021425315543} is an apocalyptic number.

404021425315543 is a deficient number, since it is larger than the sum of its proper divisors (58108079526761).

404021425315543 is a wasteful number, since it uses less digits than its factorization.

404021425315543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6661242.

The product of its (nonzero) digits is 1152000, while the sum is 43.

Adding to 404021425315543 its reverse (345513524120404), we get a palindrome (749534949435947).

The spelling of 404021425315543 in words is "four hundred four trillion, twenty-one billion, four hundred twenty-five million, three hundred fifteen thousand, five hundred forty-three".