204650399427 has 4 divisors (see below), whose sum is σ = 272867199240. Its totient is φ = 136433599616.

The previous prime is 204650399381. The next prime is 204650399431. The reversal of 204650399427 is 724993056402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 204650399427 - 2⁷ = 204650399299 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204650399427.

It is not an unprimeable number, because it can be changed into a prime (204650399467) 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, 34108399902 + ... + 34108399907.

It is an arithmetic number, because the mean of its divisors is an integer number (68216799810).

Almost surely, 2^204650399427 is an apocalyptic number.

204650399427 is a deficient number, since it is larger than the sum of its proper divisors (68216799813).

204650399427 is an equidigital number, since it uses as much as digits as its factorization.

204650399427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68216799812.

The product of its (nonzero) digits is 3265920, while the sum is 51.

The spelling of 204650399427 in words is "two hundred four billion, six hundred fifty million, three hundred ninety-nine thousand, four hundred twenty-seven".