404021125553009 has 2 divisors, whose sum is σ = 404021125553010. Its totient is φ = 404021125553008.

The previous prime is 404021125552927. The next prime is 404021125553021. The reversal of 404021125553009 is 900355521120404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 311599282230625 + 92421843322384 = 17652175^2 + 9613628^2 .

It is a cyclic number.

It is not a de Polignac number, because 404021125553009 - 2⁸ = 404021125552753 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (404021125553209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202010562776504 + 202010562776505.

It is an arithmetic number, because the mean of its divisors is an integer number (202010562776505).

Almost surely, 2^{404021125553009} is an apocalyptic number.

It is an amenable number.

404021125553009 is a deficient number, since it is larger than the sum of its proper divisors (1).

404021125553009 is an equidigital number, since it uses as much as digits as its factorization.

404021125553009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 404021125553009 in words is "four hundred four trillion, twenty-one billion, one hundred twenty-five million, five hundred fifty-three thousand, nine".