204100155550 has 24 divisors (see below), whose sum is σ = 399606622200. Its totient is φ = 77343216480.

The previous prime is 204100155541. The next prime is 204100155557. The reversal of 204100155550 is 55551001402.

204100155550 is digitally balanced in base 2, 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 (204100155557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107420185 + ... + 107422084.

It is an arithmetic number, because the mean of its divisors is an integer number (16650275925).

Almost surely, 2^204100155550 is an apocalyptic number.

204100155550 is a deficient number, since it is larger than the sum of its proper divisors (195506466650).

204100155550 is a wasteful number, since it uses less digits than its factorization.

204100155550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214842300 (or 214842295 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 28.

Adding to 204100155550 its reverse (55551001402), we get a palindrome (259651156952).

The spelling of 204100155550 in words is "two hundred four billion, one hundred million, one hundred fifty-five thousand, five hundred fifty".