409205611 has 8 divisors (see below), whose sum is σ = 424940544. Its totient is φ = 393629160.

The previous prime is 409205567. The next prime is 409205647. The reversal of 409205611 is 116502904.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 409205611 - 2⁷ = 409205483 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 409205611.

It is not an unprimeable number, because it can be changed into a prime (409205411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34345 + ... + 44698.

It is an arithmetic number, because the mean of its divisors is an integer number (53117568).

Almost surely, 2^409205611 is an apocalyptic number.

409205611 is a deficient number, since it is larger than the sum of its proper divisors (15734933).

409205611 is a wasteful number, since it uses less digits than its factorization.

409205611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79241.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 409205611 is about 20228.8311822507. The cubic root of 409205611 is about 742.4157785565.

The spelling of 409205611 in words is "four hundred nine million, two hundred five thousand, six hundred eleven".