204084618457 has 2 divisors, whose sum is σ = 204084618458. Its totient is φ = 204084618456.

The previous prime is 204084618421. The next prime is 204084618527. The reversal of 204084618457 is 754816480402.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189459102361 + 14625516096 = 435269^2 + 120936^2 .

It is a cyclic number.

It is not a de Polignac number, because 204084618457 - 2¹⁵ = 204084585689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204084618457.

It is not a weakly prime, because it can be changed into another prime (204084619457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102042309228 + 102042309229.

It is an arithmetic number, because the mean of its divisors is an integer number (102042309229).

Almost surely, 2^204084618457 is an apocalyptic number.

It is an amenable number.

204084618457 is a deficient number, since it is larger than the sum of its proper divisors (1).

204084618457 is an equidigital number, since it uses as much as digits as its factorization.

204084618457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1720320, while the sum is 49.

The spelling of 204084618457 in words is "two hundred four billion, eighty-four million, six hundred eighteen thousand, four hundred fifty-seven".