4099855609 has 8 divisors (see below), whose sum is σ = 4359040488. Its totient is φ = 3842672640.

The previous prime is 4099855603. The next prime is 4099855649. The reversal of 4099855609 is 9065589904.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1815015609 + 2284840000 = 42603^2 + 47800^2 .

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 4099855609 - 2⁷ = 4099855481 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 4099855609.

It is not an unprimeable number, because it can be changed into a prime (4099855603) 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, 496252 + ... + 504445.

It is an arithmetic number, because the mean of its divisors is an integer number (544880061).

Almost surely, 2^4099855609 is an apocalyptic number.

It is an amenable number.

4099855609 is a deficient number, since it is larger than the sum of its proper divisors (259184879).

4099855609 is a wasteful number, since it uses less digits than its factorization.

4099855609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000955.

The product of its (nonzero) digits is 3499200, while the sum is 55.

The square root of 4099855609 is about 64030.1148601188. The cubic root of 4099855609 is about 1600.5018749814.

The spelling of 4099855609 in words is "four billion, ninety-nine million, eight hundred fifty-five thousand, six hundred nine".