204025147809 has 16 divisors (see below), whose sum is σ = 310902007680. Its totient is φ = 116583344640.

The previous prime is 204025147793. The next prime is 204025147831. The reversal of 204025147809 is 908741520402.

It is not a de Polignac number, because 204025147809 - 2⁴ = 204025147793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204025147889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1511127 + ... + 1640595.

It is an arithmetic number, because the mean of its divisors is an integer number (19431375480).

Almost surely, 2^204025147809 is an apocalyptic number.

It is an amenable number.

204025147809 is a deficient number, since it is larger than the sum of its proper divisors (106876859871).

204025147809 is a wasteful number, since it uses less digits than its factorization.

204025147809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204520.

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 204025147809 in words is "two hundred four billion, twenty-five million, one hundred forty-seven thousand, eight hundred nine".