305063985498561 has 9 divisors (see below), whose sum is σ = 440648054739841. Its totient is φ = 203375955400212.

The previous prime is 305063985498487. The next prime is 305063985498563. The reversal of 305063985498561 is 165894589360503.

The square root of 305063985498561 is 17466081.

It is a perfect power (a square), and thus also a powerful number.

305063985498561 is a `hidden beast` number, since 3 + 0 + 5 + 0 + 6 + 3 + 9 + 8 + 54 + 9 + 8 + 561 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 305063985498561 - 2⁴¹ = 302864962243009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 305063985498561.

It is not an unprimeable number, because it can be changed into a prime (305063985498563) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 49487230 + ... + 55309256.

Almost surely, 2^{305063985498561} is an apocalyptic number.

305063985498561 is the 17466081-st square number.

305063985498561 is the 8733041-st centered octagonal number.

It is an amenable number.

305063985498561 is a deficient number, since it is larger than the sum of its proper divisors (135584069241280).

305063985498561 is an frugal number, since it uses more digits than its factorization.

305063985498561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11644060 (or 5822030 counting only the distinct ones).

The product of its (nonzero) digits is 839808000, while the sum is 72.

The spelling of 305063985498561 in words is "three hundred five trillion, sixty-three billion, nine hundred eighty-five million, four hundred ninety-eight thousand, five hundred sixty-one".