3609209855 has 4 divisors (see below), whose sum is σ = 4331051832. Its totient is φ = 2887367880.

The previous prime is 3609209833. The next prime is 3609209893. The reversal of 3609209855 is 5589029063.

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

It is not a de Polignac number, because 3609209855 - 2²² = 3605015551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360920981 + ... + 360920990.

It is an arithmetic number, because the mean of its divisors is an integer number (1082762958).

Almost surely, 2^3609209855 is an apocalyptic number.

3609209855 is a deficient number, since it is larger than the sum of its proper divisors (721841977).

3609209855 is an equidigital number, since it uses as much as digits as its factorization.

3609209855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721841976.

The product of its (nonzero) digits is 583200, while the sum is 47.

The square root of 3609209855 is about 60076.6997678801. The cubic root of 3609209855 is about 1533.9247145701.

The spelling of 3609209855 in words is "three billion, six hundred nine million, two hundred nine thousand, eight hundred fifty-five".