404092871521 has 8 divisors (see below), whose sum is σ = 442616938920. Its totient is φ = 367208126208.

The previous prime is 404092871491. The next prime is 404092871629. The reversal of 404092871521 is 125178290404.

It can be written as a sum of positive squares in 4 ways, for example, as 157997505121 + 246095366400 = 397489^2 + 496080^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 404092871521 - 2⁷ = 404092871393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404092878521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409830006 + ... + 409830991.

It is an arithmetic number, because the mean of its divisors is an integer number (55327117365).

Almost surely, 2^404092871521 is an apocalyptic number.

It is an amenable number.

404092871521 is a deficient number, since it is larger than the sum of its proper divisors (38524067399).

404092871521 is a wasteful number, since it uses less digits than its factorization.

404092871521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819661043.

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 404092871521 in words is "four hundred four billion, ninety-two million, eight hundred seventy-one thousand, five hundred twenty-one".