204767540189 has 4 divisors (see below), whose sum is σ = 205546124256. Its totient is φ = 203988956124.

The previous prime is 204767540101. The next prime is 204767540251. The reversal of 204767540189 is 981045767402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 204767540189 - 2²⁰ = 204766491613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204767540189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204767540689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389291639 + ... + 389292164.

It is an arithmetic number, because the mean of its divisors is an integer number (51386531064).

Almost surely, 2^204767540189 is an apocalyptic number.

It is an amenable number.

204767540189 is a deficient number, since it is larger than the sum of its proper divisors (778584067).

204767540189 is an equidigital number, since it uses as much as digits as its factorization.

204767540189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778584066.

The product of its (nonzero) digits is 3386880, while the sum is 53.

The spelling of 204767540189 in words is "two hundred four billion, seven hundred sixty-seven million, five hundred forty thousand, one hundred eighty-nine".