4405409090581 has 2 divisors, whose sum is σ = 4405409090582. Its totient is φ = 4405409090580.

The previous prime is 4405409090543. The next prime is 4405409090639. The reversal of 4405409090581 is 1850909045044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3605475618481 + 799933472100 = 1898809^2 + 894390^2 .

It is a cyclic number.

It is not a de Polignac number, because 4405409090581 - 2¹⁵ = 4405409057813 is a prime.

It is a super-2 number, since 2×4405409090581² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4405409090501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2202704545290 + 2202704545291.

It is an arithmetic number, because the mean of its divisors is an integer number (2202704545291).

Almost surely, 2^{4405409090581} is an apocalyptic number.

It is an amenable number.

4405409090581 is a deficient number, since it is larger than the sum of its proper divisors (1).

4405409090581 is an equidigital number, since it uses as much as digits as its factorization.

4405409090581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1036800, while the sum is 49.

The spelling of 4405409090581 in words is "four trillion, four hundred five billion, four hundred nine million, ninety thousand, five hundred eighty-one".