404408442161 has 2 divisors, whose sum is σ = 404408442162. Its totient is φ = 404408442160.

The previous prime is 404408442103. The next prime is 404408442197. The reversal of 404408442161 is 161244804404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 303320055025 + 101088387136 = 550745^2 + 317944^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404408442161 is a prime.

It is not a weakly prime, because it can be changed into another prime (404408442101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202204221080 + 202204221081.

It is an arithmetic number, because the mean of its divisors is an integer number (202204221081).

Almost surely, 2^404408442161 is an apocalyptic number.

It is an amenable number.

404408442161 is a deficient number, since it is larger than the sum of its proper divisors (1).

404408442161 is an equidigital number, since it uses as much as digits as its factorization.

404408442161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98304, while the sum is 38.

The spelling of 404408442161 in words is "four hundred four billion, four hundred eight million, four hundred forty-two thousand, one hundred sixty-one".