4081018143409 has 3 divisors (see below), whose sum is σ = 4081020163563. Its totient is φ = 4081016123256.

The previous prime is 4081018143401. The next prime is 4081018143469. The reversal of 4081018143409 is 9043418101804.

The square root of 4081018143409 is 2020153.

It is a perfect power (a square), and thus also a powerful number.

4081018143409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 17052442225 + 4063965701184 = 130585^2 + 2015928^2 .

It is not a de Polignac number, because 4081018143409 - 2³ = 4081018143401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4081018143401) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1010077 + ... + 3030229.

It is an arithmetic number, because the mean of its divisors is an integer number (1360340054521).

Almost surely, 2^{4081018143409} is an apocalyptic number.

4081018143409 is the 2020153-rd square number.

4081018143409 is the 1010077-th centered octagonal number.

It is an amenable number.

4081018143409 is a deficient number, since it is larger than the sum of its proper divisors (2020154).

4081018143409 is an frugal number, since it uses more digits than its factorization.

4081018143409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4040306 (or 2020153 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The spelling of 4081018143409 in words is "four trillion, eighty-one billion, eighteen million, one hundred forty-three thousand, four hundred nine".