204855367541055 has 96 divisors (see below), whose sum is σ = 411784576541184. Its totient is φ = 85125968928000.

The previous prime is 204855367541047. The next prime is 204855367541081. The reversal of 204855367541055 is 550145763558402.

It is a happy number.

It is not a de Polignac number, because 204855367541055 - 2³ = 204855367541047 is a prime.

It is a super-2 number, since 2×204855367541055² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 204855367541055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 123827025 + ... + 125470485.

It is an arithmetic number, because the mean of its divisors is an integer number (4289422672304).

Almost surely, 2^{204855367541055} is an apocalyptic number.

204855367541055 is an abundant number, since it is smaller than the sum of its proper divisors (206929209000129).

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

204855367541055 is a wasteful number, since it uses less digits than its factorization.

204855367541055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653309 (or 1653298 counting only the distinct ones).

The product of its (nonzero) digits is 100800000, while the sum is 60.

The spelling of 204855367541055 in words is "two hundred four trillion, eight hundred fifty-five billion, three hundred sixty-seven million, five hundred forty-one thousand, fifty-five".