411995813161 has 15 divisors (see below), whose sum is σ = 437942425683. Its totient is φ = 387586176960.

The previous prime is 411995813123. The next prime is 411995813171. The reversal of 411995813161 is 161318599114.

The square root of 411995813161 is 641869.

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

It can be written as a sum of positive squares in 7 ways, for example, as 62900761 + 411932912400 = 7931^2 + 641820^2 .

It is not a de Polignac number, because 411995813161 - 2⁹ = 411995812649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (411995813171) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 185499031 + ... + 185501251.

Almost surely, 2^411995813161 is an apocalyptic number.

411995813161 is the 641869-th square number.

411995813161 is the 320935-th centered octagonal number.

It is an amenable number.

411995813161 is a deficient number, since it is larger than the sum of its proper divisors (25946612522).

411995813161 is an frugal number, since it uses more digits than its factorization.

411995813161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4510 (or 2238 counting only the distinct ones).

The product of its digits is 233280, while the sum is 49.

Multiplying 411995813161 by its sum of digits (49), we get a square (20187794844889 = 4493083²).

The spelling of 411995813161 in words is "four hundred eleven billion, nine hundred ninety-five million, eight hundred thirteen thousand, one hundred sixty-one".