204145406426 has 8 divisors (see below), whose sum is σ = 329773348884. Its totient is φ = 94220956800.

The previous prime is 204145406401. The next prime is 204145406431. The reversal of 204145406426 is 624604541402.

It can be written as a sum of positive squares in 2 ways, for example, as 204127758025 + 17648401 = 451805^2 + 4201^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 204145406426.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3925873175 + ... + 3925873226.

Almost surely, 2^204145406426 is an apocalyptic number.

204145406426 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

204145406426 is a deficient number, since it is larger than the sum of its proper divisors (125627942458).

204145406426 is a wasteful number, since it uses less digits than its factorization.

204145406426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7851746416.

The product of its (nonzero) digits is 184320, while the sum is 38.

Adding to 204145406426 its reverse (624604541402), we get a palindrome (828749947828).

The spelling of 204145406426 in words is "two hundred four billion, one hundred forty-five million, four hundred six thousand, four hundred twenty-six".