204720108555 has 32 divisors (see below), whose sum is σ = 341868957696. Its totient is φ = 104413890944.

The previous prime is 204720108493. The next prime is 204720108557. The reversal of 204720108555 is 555801027402.

204720108555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 204720108555 - 2¹³ = 204720100363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204720108557) 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 31 ways as a sum of consecutive naturals, for example, 1559449 + ... + 1685621.

It is an arithmetic number, because the mean of its divisors is an integer number (10683404928).

Almost surely, 2^204720108555 is an apocalyptic number.

204720108555 is a deficient number, since it is larger than the sum of its proper divisors (137148849141).

204720108555 is a wasteful number, since it uses less digits than its factorization.

204720108555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130907.

The product of its (nonzero) digits is 112000, while the sum is 39.

The spelling of 204720108555 in words is "two hundred four billion, seven hundred twenty million, one hundred eight thousand, five hundred fifty-five".