204426305605 has 16 divisors (see below), whose sum is σ = 253336978944. Its totient is φ = 158195442240.

The previous prime is 204426305597. The next prime is 204426305609. The reversal of 204426305605 is 506503624402.

It is not a de Polignac number, because 204426305605 - 2³ = 204426305597 is a prime.

It is a super-2 number, since 2×204426305605² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204426305609) 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, 60499 + ... + 642271.

It is an arithmetic number, because the mean of its divisors is an integer number (15833561184).

Almost surely, 2^204426305605 is an apocalyptic number.

It is an amenable number.

204426305605 is a deficient number, since it is larger than the sum of its proper divisors (48910673339).

204426305605 is a wasteful number, since it uses less digits than its factorization.

204426305605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584076.

The product of its (nonzero) digits is 172800, while the sum is 37.

The spelling of 204426305605 in words is "two hundred four billion, four hundred twenty-six million, three hundred five thousand, six hundred five".