204909223558 has 64 divisors (see below), whose sum is σ = 342665551872. Its totient is φ = 91301109120.

The previous prime is 204909223523. The next prime is 204909223559. The reversal of 204909223558 is 855322909402.

It is a happy number.

204909223558 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204909223559) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87529468 + ... + 87531808.

It is an arithmetic number, because the mean of its divisors is an integer number (5354149248).

Almost surely, 2^204909223558 is an apocalyptic number.

204909223558 is a deficient number, since it is larger than the sum of its proper divisors (137756328314).

204909223558 is a wasteful number, since it uses less digits than its factorization.

204909223558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3349.

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 204909223558 in words is "two hundred four billion, nine hundred nine million, two hundred twenty-three thousand, five hundred fifty-eight".