155504204205 has 16 divisors (see below), whose sum is σ = 284350545024. Its totient is φ = 71087636160.

The previous prime is 155504204197. The next prime is 155504204239. The reversal of 155504204205 is 502402405551.

155504204205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155504204205 - 2³ = 155504204197 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 740496106 + ... + 740496315.

It is an arithmetic number, because the mean of its divisors is an integer number (17771909064).

Almost surely, 2^155504204205 is an apocalyptic number.

155504204205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155504204205 is a deficient number, since it is larger than the sum of its proper divisors (128846340819).

155504204205 is a wasteful number, since it uses less digits than its factorization.

155504204205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480992436.

The product of its (nonzero) digits is 40000, while the sum is 33.

Adding to 155504204205 its reverse (502402405551), we get a palindrome (657906609756).

The spelling of 155504204205 in words is "one hundred fifty-five billion, five hundred four million, two hundred four thousand, two hundred five".