204066256455 has 12 divisors (see below), whose sum is σ = 353714844600. Its totient is φ = 108835336752.

The previous prime is 204066256403. The next prime is 204066256523. The reversal of 204066256455 is 554652660402.

204066256455 is a `hidden beast` number, since 20 + 4 + 0 + 6 + 62 + 564 + 5 + 5 = 666.

It is not a de Polignac number, because 204066256455 - 2¹⁰ = 204066255431 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 4534805699 = 204066256455 / (2 + 0 + 4 + 0 + 6 + 6 + 2 + 5 + 6 + 4 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 204066256455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2267402805 + ... + 2267402894.

It is an arithmetic number, because the mean of its divisors is an integer number (29476237050).

Almost surely, 2^204066256455 is an apocalyptic number.

204066256455 is a deficient number, since it is larger than the sum of its proper divisors (149648588145).

204066256455 is a wasteful number, since it uses less digits than its factorization.

204066256455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4534805710 (or 4534805707 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 45.

The spelling of 204066256455 in words is "two hundred four billion, sixty-six million, two hundred fifty-six thousand, four hundred fifty-five".