204401987522 has 16 divisors (see below), whose sum is σ = 312402380472. Its totient is φ = 100268039040.

The previous prime is 204401987521. The next prime is 204401987539. The reversal of 204401987522 is 225789104402.

It can be written as a sum of positive squares in 4 ways, for example, as 204312136081 + 89851441 = 452009^2 + 9479^2 .

It is not an unprimeable number, because it can be changed into a prime (204401987521) 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 7 ways as a sum of consecutive naturals, for example, 3895622 + ... + 3947742.

Almost surely, 2^204401987522 is an apocalyptic number.

204401987522 is a deficient number, since it is larger than the sum of its proper divisors (108000392950).

204401987522 is a wasteful number, since it uses less digits than its factorization.

204401987522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89173.

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 204401987522 in words is "two hundred four billion, four hundred one million, nine hundred eighty-seven thousand, five hundred twenty-two".