405505605 has 8 divisors (see below), whose sum is σ = 648808992. Its totient is φ = 216269648.

The previous prime is 405505603. The next prime is 405505631. The reversal of 405505605 is 506505504.

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 405505605 - 2¹ = 405505603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405505601) 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, 13516839 + ... + 13516868.

It is an arithmetic number, because the mean of its divisors is an integer number (81101124).

Almost surely, 2^405505605 is an apocalyptic number.

It is an amenable number.

405505605 is a deficient number, since it is larger than the sum of its proper divisors (243303387).

405505605 is a wasteful number, since it uses less digits than its factorization.

405505605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27033715.

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 405505605 is about 20137.1697365841. The cubic root of 405505605 is about 740.1713780087.

The spelling of 405505605 in words is "four hundred five million, five hundred five thousand, six hundred five".