204455554411111 has 4 divisors (see below), whose sum is σ = 204455584683000. Its totient is φ = 204455524139224.

The previous prime is 204455554411099. The next prime is 204455554411181. The reversal of 204455554411111 is 111114455554402.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 204455554411111 - 2³¹ = 204453406927463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204455554411181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121980 + ... + 20221918.

It is an arithmetic number, because the mean of its divisors is an integer number (51113896170750).

Almost surely, 2^{204455554411111} is an apocalyptic number.

204455554411111 is a deficient number, since it is larger than the sum of its proper divisors (30271889).

204455554411111 is a wasteful number, since it uses less digits than its factorization.

204455554411111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30271888.

The product of its (nonzero) digits is 320000, while the sum is 43.

The spelling of 204455554411111 in words is "two hundred four trillion, four hundred fifty-five billion, five hundred fifty-four million, four hundred eleven thousand, one hundred eleven".