409920171566 has 8 divisors (see below), whose sum is σ = 627962816160. Its totient is φ = 200599232848.

The previous prime is 409920171497. The next prime is 409920171569. The reversal of 409920171566 is 665171029904.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409920171569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2180426351 + ... + 2180426538.

It is an arithmetic number, because the mean of its divisors is an integer number (78495352020).

Almost surely, 2^409920171566 is an apocalyptic number.

409920171566 is a deficient number, since it is larger than the sum of its proper divisors (218042644594).

409920171566 is a wasteful number, since it uses less digits than its factorization.

409920171566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4360852938.

The product of its (nonzero) digits is 816480, while the sum is 50.

The spelling of 409920171566 in words is "four hundred nine billion, nine hundred twenty million, one hundred seventy-one thousand, five hundred sixty-six".