204545454543 has 12 divisors (see below), whose sum is σ = 295458535008. Its totient is φ = 136361795040.

The previous prime is 204545454521. The next prime is 204545454599. The reversal of 204545454543 is 345454545402.

It is a happy number.

204545454543 is a `hidden beast` number, since 2 + 0 + 4 + 5 + 4 + 54 + 54 + 543 = 666.

It is not a de Polignac number, because 204545454543 - 2²⁵ = 204511900111 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204545454143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1032603 + ... + 1214643.

It is an arithmetic number, because the mean of its divisors is an integer number (24621544584).

Almost surely, 2^204545454543 is an apocalyptic number.

204545454543 is a deficient number, since it is larger than the sum of its proper divisors (90913080465).

204545454543 is a wasteful number, since it uses less digits than its factorization.

204545454543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306894 (or 306891 counting only the distinct ones).

The product of its (nonzero) digits is 3840000, while the sum is 45.

Adding to 204545454543 its reverse (345454545402), we get a palindrome (549999999945).

The spelling of 204545454543 in words is "two hundred four billion, five hundred forty-five million, four hundred fifty-four thousand, five hundred forty-three".