204441645402 has 12 divisors (see below), whose sum is σ = 442956898410. Its totient is φ = 68147215128.

The previous prime is 204441645377. The next prime is 204441645409. The reversal of 204441645402 is 204546144402.

204441645402 is a `hidden beast` number, since 2 + 0 + 4 + 4 + 4 + 1 + 645 + 4 + 0 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 199951171281 + 4490474121 = 447159^2 + 67011^2 .

It is not an unprimeable number, because it can be changed into a prime (204441645409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5678934577 + ... + 5678934612.

Almost surely, 2^204441645402 is an apocalyptic number.

204441645402 is an abundant number, since it is smaller than the sum of its proper divisors (238515253008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204441645402 is a wasteful number, since it uses less digits than its factorization.

204441645402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11357869197 (or 11357869194 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 36.

Adding to 204441645402 its reverse (204546144402), we get a palindrome (408987789804).

The spelling of 204441645402 in words is "two hundred four billion, four hundred forty-one million, six hundred forty-five thousand, four hundred two".