6409209605 has 4 divisors (see below), whose sum is σ = 7691051532. Its totient is φ = 5127367680.

The previous prime is 6409209563. The next prime is 6409209613. The reversal of 6409209605 is 5069029046.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1171213729 + 5237995876 = 34223^2 + 72374^2 .

It is not a de Polignac number, because 6409209605 - 2¹⁰ = 6409208581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640920956 + ... + 640920965.

It is an arithmetic number, because the mean of its divisors is an integer number (1922762883).

Almost surely, 2^6409209605 is an apocalyptic number.

It is an amenable number.

6409209605 is a deficient number, since it is larger than the sum of its proper divisors (1281841927).

6409209605 is a wasteful number, since it uses less digits than its factorization.

6409209605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281841926.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 6409209605 is about 80057.5393389030. The cubic root of 6409209605 is about 1857.5256732720.

The spelling of 6409209605 in words is "six billion, four hundred nine million, two hundred nine thousand, six hundred five".